Faculty Profiles - ARAKAWA MASASHI

Information

写真a

ARAKAWA MASASHI

Organization

Faculty of Science Department of Earth and Planetary Sciences Associate Professor
School of Sciences Department of Earth and Planetary Sciences（Concurrent）
Graduate School of Sciences Department of Earth and Planetary Sciences（Concurrent）

Contact information

Tel

0928024194

Homepage

https://earth-system-chemistry.studio.site/posts/3cvy4lFV

External link

Degree

Ph.D.

Research Interests・Research Keywords

Research theme： Physical chemistry of atomic and molecular clusters

Keyword： Physical chemistry, cluster, chemical reaction, water, ice

Research period： 2011.4 - 2024.3

Awards

第65回学術奨励賞

2025.4 UBE学術振興財団気相クラスターの反応で探究する金属による水素･窒素活性化とアンモニア生成機構
最優秀発表賞

2010.10 日本惑星科学会
学生奨励賞

2010.9 日本雪氷学会・日本雪工学会雪氷研究大会（2010・仙台）での口頭発表賞

Papers

Reaction of size-selected iron-oxide cluster cations with methane: A model study of rapid methane loss in the Mars’ atmosphere Invited Reviewed International journal

Masashi Arakawa, #Satoshi Kono, @Yasuhito Sekine, and Akira Terasaki

Physical Chemistry Chemical Physics 26 ( 20 ) 14684 - 14690 2024.4 （ ISSN:1463-9076 eISSN:1463-9084 ）

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We report gas-phase reactions of free iron-oxide clusters, FenOm+, and their Ar adducts with methane in the context of chemical processes in the Mars’ atmosphere. Methane activation was observed to produce FenOmCH2+/FenOmCD2+ and FenOmC+, where the reactivity exhibited size and composition dependence. For example, the rate coefficients of the methane activation for Fe3O+ and Fe4O+ were estimated to be 1 × 10−13 and 3 × 10−13 cm3 s−1, respectively. Based on these reaction rate coefficients, presence of iron- oxide clusters/particles with a density as low as 107 cm−3 in Mars’ atmosphere would explain the rapid loss of methane observed recently by the Curiosity rover.

DOI： 10.1039/d4cp01337a

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PubMed

Repository Public URL： https://hdl.handle.net/2324/7174498
Exploring s–d, s–f, and d–f electron interactions in AgnCe+ and AgnSm+ by chemical reaction toward O2 Reviewed International journal

Masashi Arakawa, #Naho Hayashi, #Kento Minamikawa, #Tasuku Nishizato, and A. Terasaki

Journal of Physical Chemistry A 126 6920 - 6926 2022.11

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We investigate gas-phase reactions of free AgnCe+ and AgnSm+ clusters with oxygen molecules to explore s–d, s–f, and d–f electron interactions in the finite size regime; a Ce atom has a 5d electron as well as a 4f electron, whereas a Sm atom has six 4f electrons without 5d electrons. In the reaction of AgnCe+ (n = 3–20), the Ce atom located on the cluster surface provides an active site except for n = 15 and 16, as inferred from the composition of the reaction products with oxygen bound to the Ce atom as well as from their relatively high reactivity. The extremely low reactivity for n = 15 and 16 is due to encapsulation of the Ce atom by Ag atoms. The minimum reactivity observed at n = 16 suggests that a closed electronic shell with 18 valence electrons is formed with a delocalized Ce 5d electron, while the localized Ce 4f electron does not contribute to the shell closure. As for AgnSm+ (n = 1–18), encapsulation of the Sm atom was observed for n ≥ 15. The lower reactivity at n = 17 than at n = 16 and 18 implies that an 18-valence-electron shell closure is formed with s electrons from Ag and Sm atoms; Sm 4f electrons are not involved in the shell closure as in the case of AgnCe+. The present results suggest that the 4f electrons tend to localize on the lanthanoid atom, whereas the 5d electron delocalizes to contribute to the electron shell closure.

DOI： doi: 10.1021/acs.jpca.2c04941]

Repository Public URL： https://hdl.handle.net/2324/7178575
Reaction of nitric oxide molecules on transition-metal-doped silver cluster cations: Size- and dopant-dependent reaction pathways Reviewed International journal

M. Arakawa, #M. Horioka, #K. Minamikawa, #T. Kawano, and A. Terasaki

Physical Chemistry Chemical Physics 23 22947 - 22956 2021.9

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We report size- and dopant-dependent reaction pathways as well as reactivity of gas-phase free AgnM+ (M = Sc–Ni) clusters interacting with NO. The reactivity of AgnM+, except for M = Cr and Mn, exhibits a minimum at a specific size, where the cluster cation possesses 18 or 20 valence electrons consisting of Ag 5s and dopant’s 3d and 4s. The product ions range from NO adducts, AgnM(NO)m+, and oxygen adducts, AgnMOm+, to NO2 adducts, AgnM(NO2)m+. At small sizes, AgnMOm+ are the major products for M = Sc–V, whereas AgnM(NO)m+ dominate the products for M = Cr–Ni in striking contrast. In both cases, these reaction products are reminiscent of those from an atomic transition metal. However, the reaction pathways are different at least for M = Sc and Ti; kinetics measurements reveal that the present oxygen adducts are formed via NO adducts, while, for example, Ti+ is known to produce TiO+ directly by reaction with a single NO molecule. At larger sizes, on the other hand, AgnM(NO2)m+ are dominantly produced regardless of the dopant element because the dopant atom is encapsulated by the Ag host; the NO2 formation on the cluster is similar to that reported for undoped Agn+.

DOI： 10.1039/D1CP02882K

Repository Public URL： https://hdl.handle.net/2324/7178583
Reaction kinetics of nitric oxide on size-selected silver cluster cations Reviewed International journal

Masashi Arakawa, #Masataka Horioka, #Kento Minamikawa, #Tomoki Kawano, and Akira Terasaki

Journal of Physical Chemistry C 124 26881 - 26888 2020.11

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We report reactions of gas-phase free silver cluster cations, Agn+ (n
= 3−18), with nitric oxide molecules, which was studied by kinetics
measurements using an ion trap. AgnO(NO2)m−1+ and Agn(NO2)m+ were
observed as major products after multiple reactions. The reaction pathway to
form these product ions was identified by fitting the data to rate equations for n ≤
15, except for inert n = 3 and 5. Two different reaction mechanisms were found
for the formation of these products depending on cluster size; pseudo-first-order
rate constants of each step of elementary reactions were obtained. First, as found
for n = 4, 6, and 9, AgnO+ is formed by a reaction with two NO molecules, which
is followed by a release of neutral N2O. A further reaction of AgnO+ with another
NO molecule produces AgnNO2+. Agn(NO2)m+ (m ≥ 1) is thus successively
formed via an intermediate, AgnO(NO2)m−1+. This is analogous to the reaction of
NO on silver surfaces to produce NO2. Second, both AgnNO2+ and AgnO+ are formed concurrently, as found for n = 7, 8, 10, 11, 12, and 15; AgnO+ does not act as an intermediate for AgnNO2+. AgnO(NO2)m−1+ and Agn(NO2)m+ (m ≥ 2) are formed by successive addition of NO2 to AgnO+ and AgnNO2+, respectively. It is speculated that the successive addition of NO2 proceeds via disproportionation, i.e., three NO molecules are converted to NO2 and N2O. The reaction pathways of n = 13 and 14 are explained equally well by the two mechanisms. The overall reaction rate coefficients exhibit an odd−even alternation; the higher reactivity for even values of n is due to an odd number of valence electrons.

DOI： 10.1021/acs.jpcc.0c08890

Repository Public URL： https://hdl.handle.net/2324/7178582
Preadsorption effect of carbon monoxide on reactivity of cobalt cluster cations toward hydrogen Reviewed International journal

Masashi Arakawa, #Daichi Okada, #Satoshi Kono, and Akira Terasaki

Journal of Physical Chemistry A 124 9751 - 9756 2020.10

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We report gas-phase reactions of free Con(CO)+m (n = 3−11, m = 0−2) with H2, expecting a catalytic reaction of coadsorbed CO and H2 on Co+n. Preadsorption of CO molecules is found to promote H2 adsorption, in particular, on Con(CO)+ (n = 5, 8−10). Density functional theory (DFT) calculations reveal that the reactivity is governed by the molecular-orbital energy of Co+n, which is tuned by preadsorbed CO molecules. Collision-induced-dissociation experiments performed on ConCOH+2 (n = 8−10) imply that at least some of the CO and H2 molecules are bound together on Co+n.

DOI： 10.1021/acs.jpca.0c05819

Repository Public URL： https://hdl.handle.net/2324/7178579
Electronic and geometric effects on chemical reactivity of 3d-transition-metal-doped silver cluster cations toward oxygen molecules Reviewed International journal

#Shun Sarugaku, Masashi Arakawa, #Tomoki Kawano, Akira Terasaki

Journal of Physical Chemistry C 123 25890 - 25897 2019.10

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We report electronic and geometric structures of　3d-transition-metal-doped silver cluster cations, AgN−1M+ (M =　Sc−Ni), studied by chemical reaction with oxygen molecules.　The evaluated reaction rate coefficients for small sizes, N, are 2−　6 orders of magnitude higher than those of undoped AgN+,　whereas those for large N are comparable with those of AgN+.　The low reactivity at large sizes is attributed to a geometric effect,　that is, encapsulation of the dopant atom, which provides an　active site located on the surface of the cluster in small sizes. In　addition, a reactivity minimum is observed for AgN−1M+ with M　= Sc, Ti, V, Fe, Co, and Ni at a　specific size, where the cluster　possesses 18 valence electrons including 3d electrons. With the　aid of density functional theory calculations, the reactivity　minimum is suggested to be due to an electronic effect, that is, formation of a closed electronic shell by the 18 valence electrons, implying delocalized 3d electrons. Ag13Cr+ and Ag12Mn+, possessing 18 valence electrons as well, are noted to be exceptions, where d electrons are　supposed to be localized on the dopant atom because of the half-filled nature of Cr and Mn 3d orbital.

DOI： 10.1021/acs.jpcc.9b05117
The role of electronegativity on the extent of nitridation of group 5 metals as revealed by reactions of tantalum cluster cations with ammonia molecules Reviewed International journal

M. Arakawa, #K. Ando, #S. Fujimoto, @S. Mishra, @G. Naresh Patwari, and A. Terasaki

Physical Chemistry Chemical Physics 20 13794 - 13982 2018.4

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Reactions of the free tantalum cation, Ta+, and tantalum cluster cations, Tan+ (n = 2–10), with ammonia are presented. The reaction of the monomer cation, Ta+, with two molecules of NH3 leads to the formation of TaN2H2+ along with release of two H2 molecules. The dehydrogenation occurs until the formal oxidation number of the tantalum atom reaches +5. On the other hand, all the tantalum cluster cations, Tan+, react with two molecules of NH3 and form TanN2+ with the release of three H2 molecules. Further exposure to ammonia showed that TanNmH+ and TanNm+ are produced through successive reactions; a pure nitride and three H2 molecules are formed for every other NH3 molecule. The nitridation occurred until the formal oxidation number of the tantalum atoms reaches +5 as in the case of TaN2H2+ in contrast to other group 5 elements, i.e., vanadium and niobium, which have been reported to produce nitrides with lower oxidation states. The present results on small gas-phase metal- nitride clusters show correlation with their bulk properties: tantalum is known to form bulk nitrides in the oxidation states of either +5 (Ta3N5) or +3 (TaN), whereas vanadium and niobium form nitrides in the oxidation state of +3 (VN and NbN). Along with DFT calculations, these findings reveal that nitridation is driven by the electron-donating ability of group 5 elements, i.e., electronegativity of the metal plays a key role in determining the composition of the metal nitrides.

DOI： 10.1039/c8cp00424b

Repository Public URL： https://hdl.handle.net/2324/7178578
Adsorption and Subsequent Reaction of a Water Molecule on Silicate and Silica Cluster Anions Reviewed International journal

Masashi Arakawa, Tsubasa Omoda, Akira Terasaki

Journal of Physical Chemistry C 2017.1

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We present reactions of size-selected free silicate, MglSiOm−, and silica, SinOm−, cluster anions with a H2O molecule focusing on H2O adsorption. It was found that H2O adsorption to MglSiOm− with l = 2 and 3 (m = 4−6) is always followed by molecular oxygen release, whereas reactivity of the clusters with l = 1 (m = 3−5) was found to be much lower. On the contrary, in the reaction of SinOm− (n = 3−8, 2n − 1 ≤ m ≤ 2n + 2), a H2O adduct is observed as a major reaction product. Larger and oxygen- rich clusters tend to exhibit higher reactivity; the rate constants of the adsorption reaction are 2 orders of magnitude larger than those of CO adsorption previously reported. DFT calculations revealed that H2O is dissociatively adsorbed on SinOm− to form two SiO3(OH) tetrahedra. The site selectivity of H2O adsorption is governed by the location of the singly occupied molecular orbital (SOMO) on SinOm−. The present findings give molecular-level insights into H2O adsorption on silica and silicate species in the interstellar environment.

DOI： 10.1021/acs.jpcc.6b11689
Reaction sites of CO on size-selected silicon-oxide cluster anions: a model study of chemistry in the interstellar environment Reviewed International journal

Masashi Arakawa, Ryo Yamane, Akira Terasaki

Journal of Physical Chemistry A 120 139 - 144 2016.1

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DOI： 10.1021/acs.jpca.5b08900
Reaction of aluminum cluster cations with a mixture of O2 and H2O gases: Formation of hydrated-alumina clusters Invited Reviewed International journal

Masashi Arakawa, Kei Kohara, Akira Terasaki

Journal of Physical Chemistry C 119 10981 - 10986 2015.4

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We present reactions of size-selected free aluminum cluster
cations, AlN+ (N = 1−14), exposed to a mixture of water and oxygen gases.
It is featured that chemical species assignable to Al2O6H7+ and Al2O7H9+
were commonly produced as prominent reaction products from all of the
sizes, except N = 1. These product ions were found to be produced via the
formation of Al2O3+ in the initial stage of reactions with O2 and H2O,
which was followed by successive hydrogenation and hydration. This
reaction pathway was identified by examining reactivity of each
intermediate product step by step. Structures of the product ions were
analyzed by collision-induced dissociation experiments and DFT　calculations; for+ example, coexistence of isomers, Al2O5H5(H2O)+ and
Al2O4H3(H2O)2 , with one and two intact H2O molecules, respectively,　was suggested for Al2O6H7+. The chemical compositions of the ions +
produced in the present reactions are expressed nominally as Al2O3(H2O)nH , which is similar, except for the proton, to that of hydrated alumina, that is, forms of bulk aluminum abundant naturally. The present finding gives molecular-level insights into formation processes of aluminum minerals in a natural environment.

DOI： 10.1021/jp511293g
Size-dependent reactivity of aluminum cluster cations toward water molecules Reviewed International journal

Masashi Arakawa, Kei Kohara, Tomonori Ito, Akira Terasaki

European Physical Journal D 2013.4

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The existence of memory effect on hydrogen ordering in ice: The effect makes ice attractive Reviewed International journal

Arakawa M., Kagi H., Fernandez-Baca J. A., Chakoumakos B. C. and Fukazawa H.

Geophysical Research Letters 2011.8

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Annealing effects on hydrogen ordering in KOD-doped ice observed using neutron diffraction Reviewed International journal

Arakawa M., Kagi H. and Fukazawa H.

Journal of Molecular Structure 982 2010.3

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DOI： doi:10.1016/j.molstruc.2010.02.016
Laboratory measurements of infrared absorption spectra of hydrogen-ordered ice: a step to the exploration of ice XI in space Reviewed International journal

Arakawa M., Kagi H. and Fukazawa H.

Astrophysical Journal Supplement Series 184 2009.9

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DOI： doi:10.1088/0067-0049/184/2/361
Micro-Raman thermometer for CO2 fluids: Temperature and density dependence on Raman spectra of CO2 fluids Reviewed

Arakawa M., Yamamoto J. and Kagi H.

Chemistry Letters 37 2008.2

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DOI： doi:10.1246/cl.2008.280
Developing micro-Raman mass spectrometry for measuring carbon isotopic composition of carbon dioxide Reviewed International journal

Arakawa M., Yamamoto J. and Kagi H.

Applied Spectroscopy 61 2007.7

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DOI： doi:10.1366/000370207781393244
Photoabsorption of silver cluster cations in an ion trap: nonlinear action spectra via multi-photon dissociation vs. directly-measured linear absorption spectra Reviewed

S. Kono, S. Fujimoto, T. Ito, M. Arakawa, T. Horio, and A. Terasaki

Nanoscale 17 ( 8 ) 4408 - 4414 2024.12 （ ISSN:2040-3364 eISSN:2040-3372 ）

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We report photodissociation processes and spectral measurements upon photoabsorption of size-selected cationic silver clusters, AgN+, stored in an ion trap. The experiment shows that small clusters (N ≲ 15) dissociate upon one-photon absorption, whereas larger ones require multiple photons up to five in the present study. The emergence of multi-photon processes is attributed to collisional cooling in the presence of a buffer helium gas in the trap, which competes with size-dependent dissociation rates. These observations are explained by simulations that consider the two competing effects, where the statistical Rice-Ramsperger-Kassel (RRK) theory is employed to evaluate dissociation rates. Action spectra of photodissociation are compared with linear absorption spectra directly measured by cavity-ring-down-type high-sensitivity spectroscopy, revealing that the profiles of the action spectra are sharpened by the nonlinear effects in the multi-photon regime. This observation demonstrates the importance of the linear absorption measurement to obtain both spectral profiles and cross sections for large clusters that exhibit multi-photon dissociation.

DOI： 10.1039/D4NR03563A

DOI： 10.1039/D4NR03563A

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Freezing delay of water droplets in a vacuum caused by polyol addition Reviewed

T. Yoshioka, T. Kusumoto, T. Handa, M. Arakawa, and A. Terasaki

Chemistry Letters 53 ( 12 ) upae222 - upae222 2024.11 （ ISSN:0366-7022 eISSN:1348-0715 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Chemistry Letters

Droplets of pure water and polyol aqueous solutions with a diameter of several tens of micrometers were introduced into a vacuum to observe their freezing processes. The freezing time, i.e. the time elapsed from droplet generation to freezing, was found to become delayed as the polyol concentration increases. It was also found that the freezing time does not show significant dependence on the type of polyol at the same concentration. The observed delay caused by the addition of polyols is explainable by a plausible decrease in the homogeneous-ice nucleation temperature rather than by a drop in the vapor pressure.

DOI： 10.1093/chemle/upae222

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Photoelectron Imaging Signature for Selective Formation of Icosahedral Anionic Silver Cages Encapsulating Group 5 Elements: M@Ag_12^– (M = V, Nb, and Ta)

Suzuki Yuta, Matsumoto Kazuaki, Nomi Rin, Arakawa Masashi, Horio Takuya, Terasaki Akira

The Journal of Physical Chemistry Letters 15 ( 16 ) 4327 - 4332 2024.4 （ eISSN:19487185 ）

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An assembly of 13 atoms can form highly symmetric architectures like those belonging to D_<3h>, O_h, D_<5h>, and I_h point groups. Here, using photoelectron imaging spectroscopy in combination with density functional theory (DFT) calculations, we present a simple yet convincing experimental signature for the selective formation of icosahedral cages of anionic silver clusters encapsulating a dopant atom of group 5 elements: M@Ag_<12>^– (M = V, Nb, and Ta). Their photoelectron images obtained at 4 eV closely resemble one another: only a single ring is observed, which is assignable to photodetachment signals from a 5-fold degenerate superatomic 1D electronic shell in the 1S^21P^61D^<10> configuration of valence electrons. The perfect degeneracy represents an unambiguous fingerprint of an icosahedral symmetry, which would otherwise be lifted in all of the other structural isomers. DFT calculations confirm that I_h forms are the most stable and that D_<5h>, O_h, and D_<3h> structures are not found even in metastable states.

CiNii Research
Probing Superatomic Orbitals of Sc-Doped and Undoped Silver Cluster Anions via Photoelectron Angular Anisotropy Reviewed

Minamikawa K., Nishizato T., Hashimoto H., Matsumoto K., Arakawa M., Horio T., Terasaki A.

The Journal of Physical Chemistry Letters 14 ( 17 ) 4011 - 4018 2023.4 （ eISSN:19487185 ）

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Valence s electrons in alkali- or coinage-metal clusters are conceived to delocalize over the metal frameworks. The electrons occupy so-called superatomic orbitals (SAOs, i.e., 1S, 1P, 1D, 2S, 1F, ...), which provide an essential picture for understanding the size-dependent, unique properties of these metal clusters. While such electronic shells are unambiguously identified in their photoelectron spectra and supported by electronic structure calculations, characterization of SAOs in heteroatom-doped metal clusters has remained elusive as the doping significantly affects its energy levels and even alters the ordering of SAOs. Here, we present a photoelectron imaging study to explore SAOs formed in Sc-doped and undoped silver cluster anions, Ag_NSc^– (N = 15, 16) and Ag_N^– (N = 18, 19). Photoelectron angular distributions from their outermost SAOs are clearly visualized, whose characters are analyzed with the aid of density functional theory calculations. The present methodology enables us to explore not only the quantized energy levels but also the spatial distributions of SAOs formed in various metal cluster anions.

CiNii Research
Photodestruction Action Spectroscopy of Silver Cluster Anions, AgN− (N = 3–19), with a Linear Ion Trap: Observation of Bound Excited States above the Photodetachment Threshold Invited Reviewed International journal

#S. Kawamura, M. Yamaguchi, #S. Kono, M. Arakawa, @T. Yasuike, T. Horio, and A. Terasaki

J. Phys. Chem. A 127 ( 29 ) 6063 - 6070 2023.4 （ ISSN:1089-5639 eISSN:1520-5215 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Physical Chemistry A

Electron detachment thresholds of metal cluster anions, MN-, are a few electron volts. The excess electron is therefore detached by visible or ultraviolet light, which also creates low-lying bound electronic states, MN-*; i.e., MN-* energetically overlaps with the continuum, MN + e-. Here, we perform action spectroscopy of photodestruction, leading either to photodetachment or to photofragmentation, for size-selected silver cluster anions, AgN- (N = 3-19), to unveil such bound electronic states embedded in the continuum. The experiment takes advantage of a linear ion trap that enables us to measure photodestruction spectra with high quality at well-defined temperatures, where bound excited states, AgN-*, are clearly identified above their vertical detachment energies. Structural optimization of AgN- (N = 3-19) is conducted by using density functional theory (DFT), which is followed by calculations of vertical excitation energies by time-dependent DFT to assign the observed bound states. Spectral evolution observed as a function of cluster size is also discussed, where the optimized geometries are found to be closely related to the observed spectral profiles. A plasmonic band consisting of nearly degenerate individual excitations is observed for N = 19.

DOI： 10.1021/acs.jpca.3c02900

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Repository Public URL： https://hdl.handle.net/2324/7174365
Probing Superatomic Orbitals of Sc-Doped and Undoped Silver Cluster Anions via Photoelectron Angular Anisotropy Invited Reviewed International journal

#K. Minamikawa, #T. Nishizato, #H. Hashimoto, #K. Matsumoto, M. Arakawa, T. Horio, and A. Terasaki

J. Phys. Chem. Lett. 14 ( 17 ) 4011 - 4018 2023.4 （ ISSN:1948-7185 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Physical Chemistry Letters

Valence s electrons in alkali- or coinage-metal clusters are conceived to delocalize over the metal frameworks. The electrons occupy so-called superatomic orbitals (SAOs, i.e., 1S, 1P, 1D, 2S, 1F, ...), which provide an essential picture for understanding the size-dependent, unique properties of these metal clusters. While such electronic shells are unambiguously identified in their photoelectron spectra and supported by electronic structure calculations, characterization of SAOs in heteroatom-doped metal clusters has remained elusive as the doping significantly affects its energy levels and even alters the ordering of SAOs. Here, we present a photoelectron imaging study to explore SAOs formed in Sc-doped and undoped silver cluster anions, AgNSc- (N = 15, 16) and AgN- (N = 18, 19). Photoelectron angular distributions from their outermost SAOs are clearly visualized, whose characters are analyzed with the aid of density functional theory calculations. The present methodology enables us to explore not only the quantized energy levels but also the spatial distributions of SAOs formed in various metal cluster anions.

DOI： 10.1021/acs.jpclett.3c00538

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Exploring s–d, s–f, and d–f Electron Interactions in Ag_nCe^+ and Ag_nSm^+ by Chemical Reaction toward O_2

Arakawa Masashi, Hayashi Naho, Minamikawa Kento, Nishizato Tasuku, Terasaki Akira

The Journal of Physical Chemistry A 126 ( 39 ) 6920 - 6926 2022.9 （ ISSN:10895639 eISSN:15205215 ）

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We investigate gas-phase reactions of free Ag_nCe^+ and Ag_nSm^+ clusters with oxygen molecules to explore s–d, s–f, and d–f electron interactions in the finite size regime; a Ce atom has a 5d electron as well as a 4f electron, whereas a Sm atom has six 4f electrons without 5d electrons. In the reaction of Ag_nCe^+ (n = 3–20), the Ce atom located on the cluster surface provides an active site except for n = 15 and 16, as inferred from the composition of the reaction products with oxygen bound to the Ce atom as well as from their relatively high reactivity. The extremely low reactivity for n = 15 and 16 is due to encapsulation of the Ce atom by Ag atoms. The minimum reactivity observed at n = 16 suggests that a closed electronic shell with 18 valence electrons is formed with a delocalized Ce 5d electron, while the localized Ce 4f electron does not contribute to the shell closure. As for Ag_nSm^+ (n = 1–18), encapsulation of the Sm atom was observed for n ≥ 15. The lower reactivity at n = 17 than at n = 16 and 18 implies that an 18-valence-electron shell closure is formed with s electrons from Ag and Sm atoms; Sm 4f electrons are not involved in the shell closure as in the case of Ag_nCe^+. The present results suggest that the 4f electrons tend to localize on the lanthanoid atom, whereas the 5d electron delocalizes to contribute to the electron shell closure.

DOI： 10.1021/acs.jpca.2c04941

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CiNii Research
Photoelectron imaging of size-selected metal cluster anions in a quasi-continuous mode

Horio Takuya, Minamikawa Kento, Nishizato Tasuku, Hashimoto Haruki, Matsumoto Kazuaki, Arakawa Masashi, Terasaki Akira

Review of Scientific Instruments 93 ( 8 ) 083302 2022.8 （ ISSN:00346748 eISSN:10897623 ）

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We present a novel high-repetition-rate photoelectron imaging (PEI) apparatus for exploring electronic structures of metal cluster anions. A continuous beam of mass-selected metal cluster anions, generated by a magnetron-sputtering cluster-ion source coupled with a quadrupole mass filter, is chopped into sub-megahertz ion bunches using a high-voltage pulser. The quasi-continuous anion beam is introduced into a PEI spectrometer, where the anions are photodetached using a 404 nm (3.07 eV) continuous-wave laser diode. As a demonstration, we acquire photoelectron images for size-selected Ag cluster anions, Ag_N̄ (N = 3, 7, 14), and show that each image can be obtained in a short accumulation time (50 s) with a kinetic energy resolution (ΔE/E) of 4% at E = 1.77 eV. The quasi-continuous PEI technique enables high-count-rate, space-charge-free acquisition of photoelectron spectra and angular distributions not only from size-selected metal cluster anions but also from anions prepared by other continuous ion sources, such as electrospray ionization.

DOI： 10.1063/5.0097968

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Photoelectron imaging of size-selected metal cluster anions in a quasi-continuous mode Reviewed International journal

T. Horio, #K. Minamikawa, #T. Nishizato, #H. Hashimoto, #K. Matsumoto, M. Arakawa, and A. Terasaki

Review of Scientific Instruments 2022.8

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Electron counting is a concept that often governs properties of molecules, clusters, and complexes. Here we explore silver clusters doped with a transition-metal atom, where it has been an issue whether or not 3d electrons delocalize to participate in electron counting. The experiment is performed on AgNM+/􏰀 (M = Sc–Ni) clusters to examine their stability through chemical reactivity, enabling systematic control of the number of valence electrons by the cluster size, the charge state, and the transition-metal element across the periodic table. It is revealed for 18-valence-electron clusters that 3d electrons participate in electron counting to show exceptional stability only when the transition-metal atom is endohedrally doped, except for Cr and Mn doping that forces 3d electrons to localize. We thus present new entries for superatomic metal clusters as well as a geometric factor that regulates the behavior of 3d electrons in the nanoscale regime.

Repository Public URL： http://hdl.handle.net/2324/4822554
Electron counting in cationic and anionic silver clusters doped with a 3d transition-metal atom: endo- vs. exohedral geometry Reviewed International journal

#K. Minamikawa, S. Sarugaku, M. Arakawa, and A. Terasaki

Physical Chemistry Chemical Physics 24 1447 - 1455 2022.1

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Electron counting is a concept that often governs properties of molecules, clusters, and complexes. Here we explore silver clusters doped with a transition-metal atom, where it has been an issue whether or not 3d electrons delocalize to participate in electron counting. The experiment is performed on AgNM+/􏰀 (M = Sc–Ni) clusters to examine their stability through chemical reactivity, enabling systematic control of the number of valence electrons by the cluster size, the charge state, and the transition-metal element across the periodic table. It is revealed for 18-valence-electron clusters that 3d electrons participate in electron counting to show exceptional stability only when the transition-metal atom is endohedrally doped, except for Cr and Mn doping that forces 3d electrons to localize. We thus present new entries for superatomic metal clusters as well as a geometric factor that regulates the behavior of 3d electrons in the nanoscale regime.

DOI： DOI: 10.1039/D1CP04197E
銀クラスター上での一酸化窒素分子の逐次反応：サイズに依存した反応経路

荒川雅, 寺嵜亨

Bull. Jpn. Soc. Coord. Chem. (錯体化学会誌) 80 53 - 57 2022

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Oxidation-state analysis of manganese-oxide clusters, Mn_xO_y⁺ (x = 4, y = 4–7), by X-ray absorption spectroscopy Invited Reviewed International journal

Tetsuichiro Hayakawa; Masashi Arakawa; #Kento Minamikawa; #Shuhei Fujimoto; #Tomoki Kawano; Akira Terasaki

Chemical Physics Letters in press 2021.10

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X-ray absorption spectroscopy of small copper-oxide cluster ions for analyses of Cu oxidation state and Ar complexation: CuOAr⁺ and Cu₂O₂⁺ Invited Reviewed International journal

@T. Hayakawa, M. Arakawa, #S. Kono, #T. Handa, #N. Hayashi, #K. Minamikawa, T. Horio, and Akira Terasaki

Z. Phys. Chem. 235 213 - 224 2021.2

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DOI： 10.1515/zpch-2020-1668
A revisit to electronic structures of cobalt-doped silver cluster anions by size-dependent reactivity measurement Reviewed International journal

#K. Minamikawa, M. Arakawa, @K. Tono, and A. Terasaki

Chemical Physics Letters 753 137613 2020.5

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DOI： 10.1016/j.cplett.2020.137613
Improvement of reflectron time-of-flight mass spectrometer for better convergence of ion beam Reviewed International journal

#T. Handa, T. Horio, M. Arakawa, and A. Terasaki

International Journal of Mass Spectrometry 2020.3

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Analysis of cluster growth in magnetron-sputtering metal-cluster source by optical emission spectroscopy Reviewed International journal

#Satoshi Kono, Masashi Arakawa, Akira Terasaki

Chemistry Letters 48 1537 - 1540 2019.10

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DOI： 10.1246/cl.190727
Adsorption kinetics of nitrogen molecules on size-selected silver cluster cations Invited Reviewed International journal

#T. Ito, M. Arakawa, #Y. Taniguchi, and A. Terasaki

Zeitschrift für Physikalische Chemie 233 759 - 770 2019.4

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DOI： 10.1515/zpch-2019-1373
Charge-state analysis of small barium-oxide clusters by X-ray absorption spectroscopy Invited Reviewed International journal

@Hayakawa, M. Arakawa, #K. Ando, #Y. Kiyomura, #T. Kawano, and A. Terasaki

J. Phys.: Condens. Matter 31 134003 2019.3

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DOI： 10.1088/1361-648X/aafe18
Freezing of micrometer-sized liquid droplets of pure water evaporatively cooled in a vacuum Reviewed International journal

#K. Ando, M. Arakawa, and A. Terasaki

Physical Chemistry Chemical Physics 20 28435 - 28444 2018.10

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Freezing processes are reported for pure-water droplets generated in a vacuum in the size range of 49–71 mm in diameter. The process is characterized for each size by measurement of a freezing curve, where the fraction of frozen droplets is evaluated as a function of time. The 49 mm droplet was found to freeze at a time between 7.0 and 7.9 ms after being generated at room temperature, where the fraction of frozen droplets increased from 5% to 95%; the freezing time was thus distributed statistically within 1 ms. The freezing time was retarded by about 3 ms as the size increases from 49 to 71 mm, while the rise time of the freezing curve was almost unchanged. Numerical simulation of a cooling curve, i.e., the temperature of a droplet as a function of time, revealed that the droplets in the present size range are frozen at almost the same temperature between 233 and 236 K. The freezing curves measured in the experiment were well reproduced by numerical simulation based on the simulated cooling curves combined with the temperature dependence of the volume-based homogeneous ice nucleation rates of pure water reported previously. It was also found that a droplet is disintegrated into a few fragments upon freezing, which suggests formation of a frozen shell in the outer region of a droplet.

DOI： 10.1039/C8CP05955A
Characterization of Cerium and Oxygen Atoms in Free Clusters of Cerium Oxide by X-ray Absorption Spectroscopy Reviewed International journal

@T. Hayakawa, M. Arakawa, #S. Sarugaku, #K. Ando, #K. Tobita, #Y. Kiyomura, #T. Kawano, A. Terasaki

Topics in Catalysis 61 119 - 125 2017.12

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DOI： 10.1007/s11244-017-0869-y
Space focusing extensively spread ions in time-of-flight mass spectrometry by nonlinear ion acceleration Reviewed International journal

Shun Sarugaku, Masashi Arakawa, Akira Terasaki

International Journal of Mass Spectrometry ( 414 ) 65 - 69 2017.1

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DOI： 10.1016/j.ijms.2017.01.003
Size-Dependent Reactivity of Nickel-Doped Silver Cluster Cations toward Oxygen: Electronic and Geometric Effects Reviewed International journal

Shun Sarugaku, R. Murakami, J. Matsumoto, T. Kawano, Masashi Arakawa, Akira Terasaki

Chemistry Letters 46 385 - 388 2017.1

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DOI： 10.1246/cl.161094
Evaporation processes of a liquid droplet of ethylene glycol in a vacuum Reviewed International journal

Kota Ando, Masashi Arakawa, Akira TERASAKI

Chemistry Letters 45 961 - 963 2016.5

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DOI： 10.1246/cl.160381
X-ray absorption spectroscopy of Ce2O3+ and Ce2O5+ near Ce M-edge Reviewed International journal

T. Hayakawa, K. Egashira, M. Arakawa, T. Ito, S. Sarugaku, K. Ando, A. Terasaki

Journal of Physics B 2016.2

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Properties of ferroelectric ice Invited Reviewed International journal

Hiroshi Fukazawa, Masashi Arakawa, Hiroki Yamauchi, Yurina Sekine, Riki Kobayashi, Yoshiya Uwatoko, Songxue Chi, Jaime A. Fernandez-Baca

JPS Conference Proceeding 8 033010-1 - 033010-6 2015.11

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Water-induced adsorption of carbon monoxide and oxygen on the gold dimer cation Reviewed International journal

Tomonori Ito, G. Naresh Patwari, Masashi Arakawa, Akira Terasaki

Journal of Physical Chemistry A 2014.3

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DOI： 10.1021/jp501111f
Precise determination of Mg/Fe ratio applicable to terrestrial olivine using Raman spectroscopy Reviewed

Ishibashi H., Arakawa M., Yamamoto J. and Kagi H.

Journal of Raman Spectroscopy 43 2012.2

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Neutron diffraction study of hydrogen-ordered ice XI: Annealing effect and memory effect Reviewed

Arakawa M., Kagi H., Fernandez-Baca J. A., Chakoumaks B. C. and Fukazawa H.

Physics and Chemistry of ice 2010 (Hokkaido University Press) 2011.5

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Structure and Properties of Ferroelectric Water Ice Reviewed

Fukazawa H., Arakawa M., Kagi H., Yamauchi H., Fernandez-Baca J. A., Chakoumaks B. C.

Physics and Chemistry of ice 2010 (Hokkaido University Press) 2011.5

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A cubic-anvil high-pressure device for pulsed neutron powder diffraction Reviewed

Abe J., Arakawa M., Hattori T., Arima H., Kagi H., Komatsu K., Sano A., Uwatoko Y., Matsubayashi K., Harjo S., Moriai A., Ito T., Aizawa K., Arai M. and Utsumi W.

Review of Scientific Instruments 81 2010.6

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DOI： doi:10.1063/1.3384238
High-pressure experiments with the engineering material diffractometer (BL-19) at J-PARC Reviewed

Abe J., Hattori T., Komatsu K., Arima H., Arakawa M., Sano A., Kagi H., Harjo S., Ito T., Moriai A., Aizawa K., Arai M. and Utsumi W.

Journal of Physics: Conference Series 215 2010.6

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Simultaneous detemination of Mg# and residual pressure in olivine using micro-Raman spectroscopy Reviewed International journal

Journal of Mineralogical and Petrological Sciences

104 2009.6

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Publishing type：Research paper (scientific journal)

DOI： doi:10.2465/jmps.090615
Relationship between Raman spectral pattern and crystallographic orientation of a rock-forming mineral: a case study of Fo89Fa11 olivine Reviewed International journal

Ishibashi H., Arakawa M., Ohi S., Yamamoto J., Miyake A. and Kagi H.

Journal of Raman Spectroscopy 39 2008.6

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Publishing type：Research paper (scientific journal)

DOI： doi:10.1002/jrs.2094
Divalent chromium in ferropericlase inclusions in lower mantle diamonds revealed by micro-XANES spectroscopy Reviewed International journal

Odake S., Fukura S., Arakawa M., Ohta A., Herte B., and Kagi H.

Journal of Mineralogical and Petrological Sciences 103 ( 350-353 ) 2008.6

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Publishing type：Research paper (scientific journal)

DOI： doi:10.2465/jmps.080620d

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Books

THE BLUE ZONES : 世界の100歳人に学ぶ健康と長寿9つのルール

BuettnerDan, 荒川雅志, 仙名紀

祥伝社 2022 （ ISBN:9784396617974 ）

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Language：Japanese

CiNii Books

Presentations

Mineral-Cluster Chemistry in Space: Planetary Formation Regions and Planetary Atmospheres Invited International conference

International Congress on Pure & Applied Chemistry Mongolia (ICPAC Mongolia 2024) 2024.8

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Event date： 2024.8 - 2024.9

Language：English Presentation type：Oral presentation (invited, special)

Venue：Ulaanbaatar
Reaction of Size-Selected Iron-Oxide Cluster Cations with Methane: A Model Study of Chemical Processes in Mars’ Atmosphere Invited International conference

M. Arakawa, #K. Kono, @Y. Sekine, and A. Terasaki

21th International Symposium on Small Particles and Inorganic Cluster (ISSPIC XXI) 2023.9

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Event date： 2023.9

Language：English Presentation type：Oral presentation (general)

Venue：Davos, Switzerland Country：Switzerland

Small particles and clusters of minerals such as silicate (e.g., (Mg,Fe)SiO3 and (Mg,Fe)2SiO4), and silica (SiO2) are among the most abundant materials in space. It is prevalent hypothesis that, in the early stage of planetary formation, such materials contribute to chemical processes such as formation of organic molecules. Size-selected gas-phase clusters provide a good model for this chemistry, because it is possible to investigate reactions step by step with precise control in the number of atoms and molecules involved in the reaction. Furthermore, it has recently been suggested that silica and silicate clusters could be highly abundant in the interstellar medium [1,2]. In this context, we have reported reactions of gas-phase free silicate, MglSiOm−, and silica, SinOm−, cluster anions with CO and H2O molecules [3,4]. In addition, coadsorption and subsequent reaction of CO and H2 molecules on cobalt cluster cations, Con+, has been examined to discuss formation of organic molecules on the cluster [5].
Another chemical process attracting much attention recently is rapid methane loss in the atmosphere of Mars [6]. Observation by the Curiosity rover found temporary spikes of methane and its rapid loss, but the mechanism of the loss has not been clarified yet. Mars’ soil is rich in iron oxide, and storms of iron-oxide particles (dust devils) occur very frequently. Because the iron-oxide cluster, Fe2O2, is known as an active center of enzyme, methane monooxygenase, we hypothesized that iron-oxide particles/clusters were responsible for the rapid loss. Numerous theoretical studies on the interaction of Fe2O2 with methane have been reported [7]. As for an experimental study, FeO+ was reported to mediate activation of methane [8]. In the present study, we report gas-phase reaction of size-selected iron-oxide cluster cations, FenOm+, with methane, CH4, and deuterated methane, CD4, molecules to verify our hypothesis, where methane activation was observed to produce FenOmCH2+ and FenOmC+. The reactivity exhibited size dependence. For example, the rate coefficients of the methane activation for Fe3O+ and Fe4O+ were estimated to be 1 × 10−12 and 3 × 10−12 cm3 s−1, respectively [9]. Based on these values, the presence of iron-oxide clusters/particles of 4 × 106 cm−3 (10−14 Pa) in Mars’ atmosphere would explain the loss of methane.
Reaction kinetics of NO on Agn+ and AgnM+ (M = Sc–Ni): Size- and dopant-dependent reaction pathways Invited International conference

@M. Arakawa, #M. Horioka, #K. Minamikawa, #T. Kawano, and @A. Terasaki

The Symposium on Size-Selected Clusters S3C 2023.3

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Event date： 2023.2 - 2023.3

Language：English Presentation type：Oral presentation (general)

Venue：Davos, Switzerland Country：Switzerland

Nitric oxide (NO) is one of the toxic gases generated during combustion processes, causing environmental issues such as photochemical smog and acid rain. In this context, catalytic reduction of NO is an important subject in industrial chemistry. Here we report reaction of gas-phase free silver cluster cations, Agn+, and transition-metal-doped silver cluster cations, AgnM+ (M = Sc–Ni), with NO molecules studied by kinetics measurement using an ion trap.
For the reaction of Agn+, AgnO(NO2)m−1+ and Agn(NO2)m+ are observed as major products after multiple collisions. By analysing the kinetics data, two different reaction mechanisms are found for formation of the major reaction products depending on cluster size as follows:1
(1) As found for n = 4, 6, and 9, AgnO+ is formed by reaction with two NO molecules followed by release of neutral N2O. Further reaction of AgnO+ with another NO molecule produces AgnNO2+. Agn(NO2)m+ (m ≥ 1) is thus successively formed via the intermediate, AgnO(NO2)m−1+.
(2) Both AgnNO2+ and AgnO+ are formed concurrently from Agn+ exposed to NO molecules as found for n = 7, 8, 10, 11, 12, and 15; AgnO+ does not serve as an intermediate for AgnNO2+. AgnO(NO2)m−1+ and Agn(NO2)m+ (m ≥ 2) are formed by successive addition of NO2 to AgnO+ and AgnNO2+, respectively. It is speculated that the successive addition of NO2 proceeds via disproportionation, i.e., three NO molecules are converted to NO2 and N2O.
Doping a transition metal atom to Agn+ changes the reaction products: the product ions range from NO adducts, AgnM(NO)m+, and oxygen adducts, AgnMOm+, to NO2 adducts, AgnM(NO2)m+. The rich variety of reaction products is explainable by change in the reaction site, which is either the dopant atom or the silver atom, depending on the cluster size.2
Reaction kinetics of nitric oxide molecules on silver cluster cations: Size-dependent reaction pathways Invited International conference

@M. Arakawa, #M. Horioka, #K. Minamikawa, #T. Kawano, and @A. Terasaki

International Congress on Pure & Applied Chemistry Kota Kinabalu (ICPAC Kota Kinabalu 2022) 2022.11

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Kota Kinabalu, Sabah Country：Malaysia
Elementary processes in chemical evolution studied by size-selected cluster chemistry Invited International conference

M. Arakawa and A. Terasaki

The 23rd East Asian Workshop on Chemical Dynamics (EAWCD) 2019.9

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Event date： 2019.9

Language：English Presentation type：Oral presentation (general)

Country：Japan

Adelaide, Australia
Reaction of gas-phase metal and mineral clusters with H2O, CO, and H2 molecules related to chemistry in space Invited International conference

M. Arakawa and A. Terasaki

International Congress on Pure & Applied Chemistry Yangon (ICPAC Yangon 2019) 2019.8

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Event date： 2019.8

Language：English Presentation type：Oral presentation (general)

Country：Japan

Yangon, Myanmer
孤立金属化合物クラスターの生成・分析における分光測定の活用 Invited

荒川雅, 堀尾琢哉, 寺嵜亨

第79回分析化学討論会 2019.5

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Event date： 2019.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県北九州市 Country：Japan

数個から数百個の原子から成る極微粒子、クラスターの性質は、その構成原子数（サイズ）に応じて劇的に変化する。そのため、新奇機能性物質の開拓に向けて重要な物質群である。また、反応に関与する原子・分子数を精密に制御した実験が可能であることから、クラスターは、化学反応を原子・分子スケールで探究するためのモデルとしても有用である。我々はこれまでに、金属の酸化、窒化のメカニズムや、宇宙空間での化学過程の解明を目指した研究を展開してきた。
　これらクラスター研究において、分光測定の活用が不可欠である。例えば、クラスターの生成過程の分析が挙げられる。高強度のクラスター生成法としてマグネトロンスパッタ法が用いられるが、クラスター生成源では金属原子や希ガス原子が放電により電子励起状態となり、その失活に伴って発光する。放電領域の発光スペクトルを測定することで、クラスター生成領域の温度や粒子数を解析し、放電パワーや導入ガス量などの条件の最適化を試みた。
　本講演では、クラスター生成過程の分析のほか、分光測定を活用したクラスターの物性の探究について紹介する。
The origin of bulk-nitride composition of group 5 metals as revealed by nitridation of tantalum cluster cations by ammonia molecules Invited International conference

Masashi Arakawa, G. Naresh Patwari, Akira Terasaki

International Congress on Pure & Applied Chemistry Langkawi (ICPAC Langkawi 2018) 2018.10

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Event date： 2018.10 - 2018.11

Language：English Presentation type：Oral presentation (general)

Venue：Langkawi Country：Malaysia
Successive nitridation of tantalum cluster cations by ammonia molecules: The origin of bulk-nitride composition of group 5 metals Invited International conference

M. Arakawa, K. Ando, S. Fujimoto, S. Mishra, G. Naresh Patwari, and A. Terasaki

19th International Symposium on Small Particles and Inorganic Cluster (ISSPIC XIX) 2018.8

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Event date： 2018.8

Language：English Presentation type：Oral presentation (general)

Venue：Hangzhou Country：China

Tantalum nitride is an attractive material with a potential for various applications, e.g., copper diffusion barriers in microelectronics, an interlayer in magnetic random access memories, and photocatalysts for H2 evolution. Elucidation of nitridation mechanism of tantalum at the molecular level would supply a useful recipe for fabricating high-quality tantalum-nitride materials. In this context, gas-phase clusters provide an ideal approach to probe reactions step by step with precise control in the number of atoms and molecules involved in a reaction [1,2]. In the present study, nitridation of free tantalum cation, Ta+, and tantalum cluster cations, Tan+, by ammonia molecules is investigated [3], since it is known that nitridation does not proceed by nitrogen molecules [4].
In the experiment, Tan+ (n = 1–10) was generated by a magnetron-sputter cluster-ion source. They were mass-selected and guided into a reaction cell filled with NH3 molecules. The ions produced by the reaction were identified by a quadrupole mass analyzer.
The reaction of monomer cation, Ta+, with two molecules of NH3 leads to formation of TaN2H2+ along with release of two H2 molecules. The dehydrogenation occurs until the formal oxidation number of the tantalum atom reaches +5. On the other hand, all the tantalum cluster cations, Tan+, react with two molecules of NH3 and form TanN2+ with the release of three H2 molecules. Further exposure to ammonia showed that TanNmH+ and TanNm+ are produced through successive reactions; a pure nitride and three H2 molecules are formed for every other NH3 molecule. The nitridation occurred until the formal oxidation number of tantalum atoms reaches +5 as in the case of TaN2H2+. These reaction pathways of tantalum atom and cluster cations are in contrast to those of other group 5 elements, i.e., vanadium and niobium cluster cations, which have been reported to produce nitrides with lower oxidation states [5,6]. The present results on nitridation of small clusters illustrate correlation with their bulk properties: Tantalum is known to form bulk nitrides in the oxidation states of either +5 (Ta3N5) or +3 (TaN), whereas vanadium and niobium form only an oxidation state of +3 (VN and NbN) [7]. Along with DFT calculations, these findings reveal that electronegativity of the metal (V > Nb > Ta) plays a key role in determining the composition of metal nitrides. In contrast to nitrides, all of vanadium, niobium and tantalum form most stable oxides in the oxidation state of +5 due to high electronegativity of oxygen compared with nitrogen. The present study thus revealed that electronegativity of group 5 metal is crucial for nitridation.
Application of cluster chemistry to astrochemistry: Molecular evolution involving mineral clusters Invited International conference

M. Arakawa

Kaleidoscope: A Discussion Meeting in Chemistry 2018.7

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Event date： 2018.7

Language：English Presentation type：Oral presentation (general)

Venue：Goa Country：India
Nitridation mechanism of tantalum cluster cations by ammonia molecules: contrast to other group 5 metals Invited International conference

M. Arakawa, G. Naresh Patwari, and A. Terasaki

Gas Phase Model Systems for Catalysis – GPMC 2018 2018.6

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Event date： 2018.6

Language：English Presentation type：Oral presentation (general)

Venue：Ulm Country：Germany

Tantalum nitride is an attractive material with a potential for various applications such as photocatalysts for H2 evolution from water and copper diffusion barriers in microelectronics. Elucidation of nitridation mechanism of tantalum at the molecular level would supply a useful recipe for fabricating high-quality tantalum-nitride materials. In the present study, reactions of free tantalum cation, Ta+, and tantalum cluster cations, Tan+, with ammonia molecules were investigated to probe nitridation reactions step by step with precise control in the number of atoms and molecules involved in the reaction [1].
In the experiment, Tan+ (n = 1–10) was generated by a magnetron-sputter cluster-ion source. They were thermalized through collisions with helium molecules cooled by liquid nitrogen, and were mass-selected and guided into a reaction cell filled with NH3 molecules. The ions produced by the reaction were identified by a quadrupole mass analyzer, and the yield of each reaction product was measured as a function of the cluster size, n.
The reaction of monomer cation, Ta+, with two molecules of NH3 leads to formation of TaN2H2+ along with release of two H2 molecules. The dehydrogenation occurs until the formal oxidation number of the tantalum atom reaches +5. On the other hand, all the tantalum cluster cations, Tan+, react with two molecules of NH3 and form TanN2+ with the release of three H2 molecules. Further exposure to ammonia showed that TanNmH+ and TanNm+ are produced through successive reactions; this is achieved by alternate single and double dehydrogenation upon adsorption of every other NH3 reactant molecule. The nitridation occurred until the formal oxidation number of tantalum atoms reaches +5 as in the case of TaN2H2+. These reaction pathways of tantalum atom and cluster cations are in contrast to those of other group 5 metals, i.e., vanadium and niobium clusters, which have been reported to produce nitrides with lower oxidation states [2,3]. The present results on nitridation of small clusters of group 5 metals illustrate correlation with their bulk properties: Tantalum is known to form bulk nitrides in the oxidation states of either +5 (Ta3N5) or +3 (TaN), whereas vanadium and niobium form only an oxidation state of +3 (VN and NbN) [4]. Along with DFT calculations, these findings reveal that nitridation is driven by the electron-donating ability of the group 5 element, i.e., electronegativity of the metal plays a significant role in determining the composition of metal nitrides.
Reaction of silicate clusters related to chemistry in the interstellar environment Invited International conference

@Masashi Arakawa

International Symposium on Molecular Science -Physical Chemistry/ Theoretical Chemistry, Chemoinformatics, Computational Chemistry-, 2018.3

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Event date： 2018.3 - 2018.1

Language：English Presentation type：Oral presentation (general)

Venue：Funabashi, Chiba, Japan Country：Japan
Reaction site of a CO molecule on silicon-oxide cluster anions Invited International conference

Masashi Arakawa, Ryo Yamane, Akira Terasaki

Symposium on Size Selected Clusters 2016.2

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Event date： 2016.3

Language：English Presentation type：Oral presentation (general)

Venue：Davos Country：Switzerland
Adsorption of a CO molecule on silicon-oxide cluster anions toward elucidation of reaction processes　on mineral surfaces in proto-planetary nebulae International conference

Masashi Arakawa, Ryo Yamane, Akira Terasaki

PACIFICHEM 2015 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Honolulu, HI Country：United States
Reaction sites of a CO molecule on silicon-oxide cluster anions as a model of mineral surfaces Invited International conference

Masashi Arakawa, Ryo Yamane, Akira Terasaki

Workshop on Nanoscale Atomic and Molecular Systems 2015.8

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Event date： 2015.8

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Formation of hydrated-alumina clusters toward elucidation of generation process of organic molecules on mineral surfaces International conference

Masashi Arakawa, Kei Kohara, Akira Terasaki

Workshop on Interstellar Matter 2014.10

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Event date： 2014.10

Language：English Presentation type：Oral presentation (general)

Venue：Sapporo Country：Japan
Dissociation, oxidation, hydroxylation, and hydration of aluminum cluster cations upon reaction with H2O and O2 Invited International conference

Masashi Arakawa, Kei Kohara, Akira Terasaki

Gas Phase Model Systems for Catalysis – GPMC 2014 2014.4

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Event date： 2014.4

Language：English Presentation type：Oral presentation (general)

Venue：Ulm Country：Germany
Formation of stable aluminum hydroxide clusters in aluminum-cluster ion beam exposed to O2 and H2O Invited International conference

Masashi Arakawa, Kei Kohara, Akira Terasaki

Trombay Symposium on Radiation and Photochemistry 2014.1

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Event date： 2014.1

Language：English Presentation type：Oral presentation (general)

Venue：Mumbai Country：India
Size-dependent reactivity and stability of aluminum cluster cations toward water molecules International conference

M. Arakawa, K. Kohara, T. Ito, and A. Terasaki

16th International Symposium on Small Particles and Inorganic Clusters 2012.7

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Event date： 2013.7

Venue：Leuven Country：Belgium
Selectivity in the reaction channnels of aluminum cluster cations toward H2O International conference

Masashi Arakawa, Kei Kohara, Tomonori Ito, and Akira Terasaki

Symposium on Size Selected Clusters 2013 2013.3

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Event date： 2013.3

Venue：Davos Country：Switzerland
Memory effect on hydrogen ordering in the growth of ferroelectric ice XI, 12th International Conference on the Physics and Chemistry of Ice, Sapporo, Hokkaido, Japan, September, Invited International conference

Arakawa M., Kagi H., Fernadez-Baca J. A., Chakoumakos B. C., and Fukazawa H.

12th International Conference on the Physics and Chemistry of Ice 2010.9

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Event date： 2011.9 - 2010.9

Presentation type：Oral presentation (general)

Country：Japan
Droplets of polyol aqueous solution freezing in a vacuum

T. Yoshioka, M. Arakawa, R. Akiyama, and A. Terasaki

46th Symposium on Solution Chemistry of Japan 2024.10

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Event date： 2024.10

Language：English Presentation type：Poster presentation

Venue：千葉県千葉市
サイズ選別した酸化鉄クラスター正イオンとメタンとの反応：火星大気での急速なメタン消失のモデル研究

荒川雅, #河野聖, @関根康人, 寺嵜亨

第18回分子科学討論会 2024.9

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Event date： 2024.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京都市 Country：Japan
真空中の水液滴の凍結過程：ポリオール添加効果の観測と分子動力学シミュレーション

#吉岡拓哉、荒川雅、秋山良、寺嵜亨

第18回分子科学討論会 2024.9

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Event date： 2024.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京都市 Country：Japan
3d 遷移金属原子を添加した銀クラスター正イオンの光解離分光：添加元素種によるスペクトルの変化

#青沼優奈、#平川未歩、#川村右京、#飯田岳史、@山口雅人、荒川雅、堀尾琢哉、寺嵜亨

第18回分子科学討論会 2024.9

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Event date： 2024.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京都市 Country：Japan
紫外・可視光解離分光による AgNM+（M=Sc, Al）の幾何・電子構造の解析

#平川未歩、#青沼優奈、#川村右京、#飯田岳史、@山口雅人、荒川雅、堀尾琢哉、寺嵜亨

第18回分子科学討論会 2024.9

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Event date： 2024.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京都市 Country：Japan
Raman mass spectrometry for identification <sup>17</sup>O in calcite

井上裕貴, 荒川雅, 白井厚太朗, 山本順司

地球化学会第71回年会 2024.9

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Event date： 2024.9

Language：Japanese
reezing processes of liquid droplets in a vacuum: Pure water vs. polyol aqueous solution International conference

T. Yoshioka, M. Arakawa, R. Akiyama, and A. Terasaki

17th Mini-Symposium on Liquid 2024 2024.7

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Event date： 2024.7

Language：English Presentation type：Poster presentation

Venue：Fukuoka
真空中の蒸発冷却による水液滴の均質凍結：液滴径変化の光測定と相転移挙動の高速画像観察

飯田岳史, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第104春期年会 2024.3

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Event date： 2024.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県船橋市 Country：Japan
真空中のポリオール添加水液滴の凍結過程：凍結時間の観測と分子動力学シミュレーションによる解析

吉岡拓哉, 荒川雅, 秋山良, 寺嵜亨

日本化学会第104春期年会 2024.3

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Event date： 2024.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県船橋市 Country：Japan
高繰返しレーザーとイベント駆動型画像センサを用いた光電子イメージングの開発：高効率かつ高分解能な画像取得の実現

#松本一陽, #能見倫, #鈴木悠太, #西里将, #飯田岳史, 山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

レーザー学会学術講演会第44回年次大会 2024.1

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Event date： 2024.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪府大阪市 Country：Japan
ラマン質量分析法を用いた三酸素同位体比の測定は可能か

#井上裕貴, 荒川雅, 山本順司

質量分析学会同位体比部会2023 2023.11

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Event date： 2023.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：青森県青森市 Country：Japan
5族金属元素内包正二十面体型銀クラスター負イオンM@Ag₁₂⁻の光電子イメージング：正二十面体構造の同定と超原子軌道の可視化

#鈴木悠太, #松本一陽, #能見倫, #西里将, @山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

第17回分子科学討論会 2023.9

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Event date： 2023.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪府大阪市 Country：Japan
スカンジウム添加銀クラスター正イオンの光解離分光：解離生成物分析による幾何構造の同定と電子構造に現れる異元素添加効果の解析

#平川未歩, #青沼優奈, #河村駿, #飯田岳史, #河野聖, @山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

第17回分子科学討論会 2023.9

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Event date： 2023.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪府大阪市 Country：Japan
イベント駆動型イメージセンサによる光電子画像の高速取得：重心演算を用いた画像分解能の向上

#松本一陽, #鈴木悠太, #能見倫, #西里将, #飯田岳史, @山口雅人, 荒川雅, 寺嵜亨, 堀尾琢哉

第17回分子科学討論会 2023.9

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Event date： 2023.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪府大阪市 Country：Japan
高繰返し波長可変レーザーによる金属クラスター負イオンの光電子画像観測

堀尾琢哉, #松本一陽, #鈴木悠太, #能見倫,#西里将, 荒川雅, 寺嵜亨

第17回分子科学討論会 2023.9

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Event date： 2023.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪府大阪市 Country：Japan
Photoelectron imaging of icosahedral silver cluster anions doped with a group 5 metal atom: Ag12M− (M = V, Nb, and Ta)

#Y. Suzuki, #T. Nishizato, #H. Hashimoto, #K. Matsumoto, #R. Nomi, M. Arakawa, T. Horio, and A. Terasaki

38th Symposium on Chemical Kinetics and Dynamics 2023.6

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Event date： 2023.6

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
光解離分光によるスカンジウム添加銀クラスター正イオンの電子構造解析

#平川未歩, #青沼優奈, #河村駿, #飯田岳史, #河野聖, 山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

ナノ学会第21回大会 2023.5

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Event date： 2023.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道函館市 Country：Japan
真空下の蒸発冷却過程の解明を目指した水滴径の精密測定法

飯田岳史, 吉岡拓哉, 荒川雅, 堀尾琢哉, 寺嵜亨

ナノ学会第21回大会 2023.5

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Event date： 2023.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道函館市 Country：Japan
ニッケル添加銀クラスター正イオンの光解離分光: 解離過程における幾何構造・電子構造の影響

青沼優奈, 平川未歩, 河村駿, 飯田岳史, 河野聖, 山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

ナノ学会第21回大会 2023.5

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Event date： 2023.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道函館市 Country：Japan
光電子イメージングによるAgnM− (M = Al, Sc)の電子・幾何構造の研究: 3族Scと13族Alとの比較

能見倫, 橋本治暉, 西里将, 松本一陽, 鈴木悠太, 荒川雅, 堀尾琢哉, 寺嵜亨

ナノ学会第21回大会 2023.5

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Event date： 2023.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道函館市 Country：Japan
サイズ選別銀クラスター負イオン 3–11 量体の光解離・脱離過程: 光子エネルギーに依存する励起状態寿命

河村駿, 河野聖, 山口雅人, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第103春期年会 2023.3

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県野田市 Country：Japan
3d 遷移金属添加銀クラスター負イオン 18 電子系の光電子画像観測

西里将, 橋本治暉, 松本一陽,鈴木悠太, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第103春期年会 2023.3

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県野田市 Country：Japan
Exploring superatomic orbitals of AgN− and AgNM− (M = Sc-Ni) by photoelectron imaging

T. Nishizato, H. Hashimoto, K. Matsumoto, M. Arakawa, T. Horio, and A. Terasaki

The Symposium on Size-Selected Clusters S3C 2023.2

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Event date： 2023.2 - 2023.3

Language：English Presentation type：Oral presentation (general)

Venue：Davos, Switzerland Country：Switzerland
サイズ選別銀クラスター負イオン3–11量体の光吸収過程：電子脱離と解離の競合

#河村駿, #河野聖, @山口雅人, @荒川雅, @堀尾琢哉, @寺嵜亨

第16回分子科学討論会 2022.9

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Event date： 2022.9

Language：English Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
銀および遷移金属添加銀クラスター負イオンの光電子イメージング：超原子２S軌道の可視化と理論的検証

#西里将, #橋本治暉, #松本一陽, #南川賢人, @荒川雅, @堀尾琢哉, @寺嵜亨

第16回分子科学討論会 2022.9

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Event date： 2022.9

Language：English Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
Koopmansの定理に基づく銀クラスター負イオンの垂直電子脱離エネルギー：長距離補正密度汎関数理論による予測確度の向上

#松本一陽, #西里将, #橋本治暉, #南川賢人, @荒川雅, @堀尾琢哉, @寺嵜亨

第16回分子科学討論会 2022.9

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Event date： 2022.9

Language：English Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
真空下における水滴の蒸発冷却過程：Whispering Gallery Modeの波長測定による液滴直径計測

#飯田岳史, @荒川雅, @堀尾琢哉, @寺嵜亨

第16回分子科学討論会 2022.9

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Event date： 2022.9

Language：English Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
Exploring superatomic orbitals of size-selected silver cluster anions by photoelectron imaging International conference

#T. Nishizato, #K. Minamikawa, #H. Hashimoto, #K. Matsumoto, M. Arakawa, T. Horio, and A. Terasaki

37th Symposium on Chemical Kinetics and Dynamics 2022.6

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Event date： 2022.6

Language：English Presentation type：Oral presentation (general)

Venue：Sendai Country：Japan
Photoelectron imaging spectroscopy of Sc-doped silver cluster anions International conference

#K. Minamikawa, #T. Nishizato, #H. Hashimoto, #K. Matsumoto, M. Arakawa, T. Horio, and A. Terasaki

37th Symposium on Chemical Kinetics and Dynamics 2022.6

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Event date： 2022.6

Language：English Presentation type：Oral presentation (general)

Venue：Sendai Country：Japan
ポリオール添加による真空中の水液滴の凍結遅延

#吉岡拓哉, #飯田岳史, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第102春期年会 2022.3

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
光電子イメージングによる銀クラスター負イオンの超原子軌道の探究

#西里将, #南川賢人, #橋本治暉, #松本一陽, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第102春期年会 2022.3

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
CWレーザーダイオードを用いた金属クラスター負イオンの光電子画像観測

堀尾琢哉, #南川賢人, #西里将, 荒川雅, 寺嵜亨

第15回分子科学討論会 2021.9

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
サイズ選別銀クラスター正イオンの多光子解離分光：幾何構造の推移に応じたスペクトルの形状変化

＃河村駿, #河野聖, 荒川雅, 堀尾琢哉, 寺嵜亨

第15回分子科学討論会 2021.9

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
エチレングリコール添加による真空中の水液滴の凍結時間遅延

#吉岡拓哉, #飯田岳史, #楠本多聞, 荒川雅, 堀尾琢哉, 寺嵜亨

第15回分子科学討論会 2021.9

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
Photoelectron imaging of metal cluster anions using a continuous wave laser source International conference

T. Horio, #K. Minamikawa, #T. Nishizato, M. Arakawa, and A. Terasaki

36th Symposium on Chemical Kinetics and Dynamics 2021.6

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Event date： 2021.6

Language：English Presentation type：Oral presentation (general)

Venue：online Country：Japan
セリウム添加銀クラスター正イオンの電子構造・幾何構造: 酸素との反応性を介したサイズ効果の探究

#林奈穂, #南川賢人, 荒川雅, 寺嵜亨

日本化学会第１０1春期年会 2021.3

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
Structural Features in the Growth of Silver Cluster Cations Observed by Photodissociation/Absorption Spectroscopy

#S. Kono, #S. Kawamura, #K. Morishita, M. Arakawa, T. Horio, A. Terasaki

The 101th CSJ Annual Meeting 2021.3

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Event date： 2021.3

Language：English Presentation type：Oral presentation (general)

Venue：online Country：Japan
真空下での蒸発冷却による水および水–エチレングリコール混合液滴の凍結過程

#楠本多聞, #飯田岳史, 荒川雅, 堀尾琢哉, 寺嵜亨

日本化学会第１０1春期年会 2021.3

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：online Country：Japan
酸素との反応性に基づくコバルト添加銀クラスター負イオンの電子構造解析：光電子分光の再解釈

#南川賢人, 荒川雅,　登野健介, 寺嵜亨

分子科学会オンライン討論会 2020.9

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
銀クラスター正イオンの光吸収分光：2量体から40量体まで

#河野聖, 荒川雅, 堀尾琢哉,　寺嵜亨

分子科学会オンライン討論会 2020.9

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
酸素との反応性を介したセリウム添加銀クラスター正イオンの電子構造探究

#林奈穂, #南川賢人, 荒川雅,　寺嵜亨

分子科学会オンライン討論会 2020.9

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
コバルト添加銀クラスター負イオンの電子構造：反応性測定に基づく光電子スペクトルの再解析

#南川賢人, 荒川雅, @登野健介, 寺嵜亨

ナノ学会第18回大会 2019.5

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Event date： 2020.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
コバルトクラスター正イオン上での一酸化炭素–水素分子間反応

荒川雅, #岡田大知, 寺嵜亨

ナノ学会第18回大会 2019.5

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Event date： 2020.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
マグネトロンスパッタ法での金属クラスター成長：発光分光による解析

#河野聖, 荒川雅, 寺嵜亨

ナノ学会第18回大会 2019.5

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Event date： 2020.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
イオン軌道シミュレーションによる線形イオントラップ内のイオン密度分布の解析

#河野聖, 堀尾琢哉, 荒川雅, 寺嵜亨

ナノ学会第18回大会 2019.5

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Event date： 2020.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
イオンビーム集束性能を向上させたリフレクトロン型飛行時間質量分析計の設計と実証

#飯田岳史, 堀尾琢哉, 荒川雅, 寺嵜亨

ナノ学会第1８回大会 2020.5

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Event date： 2020.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
Electronic Structures of Cobalt-doped Silver Cluster Anions, Ag_NCo⁻, Revisited: Refined Analysis of Photoelectron Spectra in Light of Chemical Reactivity

#K. Minamikawa, M. Arakawa, @K. Tono, A. Terasaki

The 100th CSJ Annual Meeting 2020.3

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Event date： 2020.3

Language：English Presentation type：Oral presentation (general)

Venue：Noda, Chiba Country：Japan
銀クラスター正イオンの光吸収・解離過程:2–40量体のサイズ依存性

#河野聖，荒川雅，堀尾琢哉, 寺嵜亨

日本化学会第１００春期年会 2020.3

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県野田市 Country：Japan
リフレクトロン型飛行時間質量分析計の検出効率向上:イオンビーム集束性能の改善

#飯田岳史，堀尾琢哉，荒川雅, 寺嵜亨

日本化学会第１００春期年会 2020.3

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Event date： 2020.3 - 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県野田市 Country：Japan
酸化セリウムと複合化した酸化マンガンクラスターの酸化状態

@早川鉄一郎, 荒川雅, #河野聖, #林奈穂, #飯田岳史, #南川賢人, 堀尾琢哉, 寺嵜亨

日本物理学会　第75回年次大会 2020.3

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：愛知県名古屋市 Country：Japan
Oxidation-state measurement by X-ray absorption spectroscopy on size-selected clusters of cerium oxide and its derivatives Invited International conference

T. Hayakawa， M. Arakawa， A. Terasaki

The 76th Fujihara Seminar: International Workshop on Designer Nanocluster Materials -From Gas Phase to Condensed Pase- 2019.10

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Event date： 2019.9 - 2019.10

Language：English Presentation type：Oral presentation (general)

Venue：Tomakomai, Hokkaido Country：Japan
The origin of composition of group 5 meetal nitrides as revealed by successive nitridation of tantalum cluster cations by NH₃ molecules Invited International conference

M. Arakawa, G. Naresh Patwari, A. Terasaki

The 76th Fujihara Seminar: International Workshop on Designer Nanocluster Materials -From Gas Phase to Condensed Pase- 2019.10

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Event date： 2019.9 - 2019.10

Language：English Presentation type：Oral presentation (general)

Venue：Tomakomai, Hokkaido Country：Japan
Cluster growth in the magnetron-sputtering cluster source studied by optical emission spectroscopy Invited International conference

#S. Kono，　M. Arakawa，　A. Terasaki

The 76th Fujihara Seminar: International Workshop on Designer Nanocluster Materials -From Gas Phase to Condensed Pase- 2019.10

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Event date： 2019.9 - 2019.10

Language：English Presentation type：Oral presentation (general)

Venue：Tomakomai, Hokkaido Country：Japan
Exploring electronic and geometric structures of both cationic and anionic transition-metal-doped silver clusters via reaction with dioxygen Invited International conference

#K. Minamikawa，　#N. Hayashi, M. Arakawa，　A. Terasaki

The 76th Fujihara Seminar: International Workshop on Designer Nanocluster Materials -From Gas Phase to Condensed Pase- 2019.10

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Event date： 2019.9 - 2019.10

Language：English Presentation type：Oral presentation (general)

Venue：Tomakomai, Hokkaido Country：Japan
マグネトロンスパッタ金属クラスター源の発光分析によるクラスター成長条件の解析

#河野聖，荒川雅，寺嵜亨

第13回分子科学討論会 2019.9

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋市 Country：Japan
遷移金属を添加した銀クラスター正イオンと一酸化窒素分子との反応: サイズと添加元素に依存した反応経路

荒川雅, #堀岡正崇, #西川享佑, #南川賢人, #河野知生, 寺嵜亨

第13回分子科学討論会 2019.9

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋市 Country：Japan
化学反応性を指標とした遷移金属添加銀クラスター正・負イオンの電子構造研究:s–d相互作用への電子数と幾何構造の効果

#南川賢人, #林奈穂, 荒川雅, 寺嵜亨

第13回分子科学討論会 2019.9

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋市 Country：Japan
イオンビーム集束性を向上させたリフレクトロン型飛行時間質量分析計

#飯田岳史，堀尾琢哉，荒川雅，寺嵜亨

第13回分子科学討論会 2019.9

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋市 Country：Japan
イオンビーム集束性能を向上させたリフレクトロン型飛行時間質量分析計の設計と実証

#飯田岳史, 堀尾琢哉, 荒川雅, 寺嵜亨

ナノ学会第17回大会 2019.5

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Event date： 2019.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：鹿児島県鹿児島市 Country：Japan
光吸収による電子の集団励起: 銀クラスター40-70量体

#藤本周平, #河野聖, 荒川雅, 堀尾琢哉, @安池智一, 寺嵜亨

日本化学会第99春季年会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
遷移金属原子を添加した銀クラスター正イオンと一酸化窒素分子との反応:サイズおよび添加元素による反応経路と生成物の変化

#堀岡正崇, #西川享佑, #南川賢人, #河野知生, 荒川雅, 寺嵜亨

日本化学会第99春季年会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
酸素分子との反応性を介した遷移金属添加銀クラスターイオン AgNM+/−の電子構造研究:18電子系における電子構造と幾何構造の相関

#南川賢人, #堀岡正崇, #河野知生, 荒川雅, 寺嵜亨

日本化学会第99春季年会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
コバルトクラスター正イオンを反応場とした一酸化炭素—水素共吸着系の生成と反応誘起

#岡田大知, #藤本周平, 荒川雅, 寺嵜亨

日本化学会第99春季年会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
酸化セリウムクラスターに付加した銅原子の酸化状態

早川鉄一郎, 荒川雅, #藤本周平, #南川賢人, #河野聖, #安東航太, 寺嵜亨

日本物理学会第74回年次大会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県福岡市 Country：Japan
銅原子を添加した酸化セリウムクラスターの酸化状態

早川鉄一郎, 荒川雅, #藤本周平, #南川賢人, #河野聖, #安東航太, 寺嵜亨

第32回日本放射光学会年会・放射光科学合同シンポジウム 2019.1

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Event date： 2019.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県福岡市 Country：Japan
一酸化炭素による鉄族元素クラスターと水素分子との反応の促進

荒川雅, #岡田大知, #藤本周平, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡市 Country：Japan
酸素との化学反応性を介した遷移金属添加銀クラスターイオンの電子構造研究

#南川賢人, #堀岡正崇, #河野知生, 荒川雅, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
遷移金属原子を添加した銀クラスター正イオンAgNM+ (M = Sc–Ni)と一酸化窒素分子との反応: 添加元素による反応性・生成物の変化

#堀岡正崇, #西川享佑, #南川賢人, #河野知生, #西浦隼, 荒川雅, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
マグネトロンスパッタ法におけるクラスター生成領域の発光スペクトル測定とその解析

#河野聖, #藤本周平, 荒川雅, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
イオンビームの空間収束性を高めるリフレクトロン型飛行時間質量分析計の設計

#飯田岳史, 荒川雅, 堀尾琢哉, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
TD-DFT計算による銀クラスター正イオンの電子励起における集団性の評価

#藤本周平, #河野聖, 荒川雅, 安池智一, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
セリウムを含む複合金属酸化物クラスターのX線吸収分光

早川鉄一郎, 荒川雅, #藤本周平, #南川賢人, #河野聖, #安東航太, 寺嵜亨

第12回分子科学討論会 2018.9

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Nitridation mechanism of tantalum clusters by ammonia molecules: The origin of bulk-nitride composition of group 5 metals International conference

@M. Arakawa, #K. Ando, #S. Fujimoto, S. Mishra, G. Naresh Patwari, @A. Terasaki

Asian Symposium on Nanoscience and Nanotechnology 2018 2018.5

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Event date： 2018.5

Language：English Presentation type：Oral presentation (general)

Venue：Bunkyo-ku, Tokyo Country：Japan
サイズ選別したコバルト添加銀クラスター負イオンAgNCo−と酸素との反応性

#南川賢人， #堀岡正崇， #河野知生，荒川雅，寺嵜亨

ナノ学会第16回大会 2018.5

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Event date： 2018.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都文京区 Country：Japan
Size-Dependent Reactivity of Transition-Metal-Doped Silver Cluster Ions: Effects of Geometric and Electronic Structures International conference

#K. Minamikawa, #M. Horioka, #T. Kawano, M. Arakawa, A. Terasaki

Asian Symposium on Nanoscience and Nanotechnology 2018 "Fundamentals and applications of Nanoclusters and Nanoparticles" 2018.5

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Event date： 2018.5

Language：English Presentation type：Oral presentation (general)

Venue：東京都文京区 Country：Japan
X線吸収分光で調べた金属酸化物クラスターの酸化状態

早川鉄一郎, @荒川雅, #安東航太, #河野知生, @寺嵜亨

日本物理学会第73回年次大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県野田市 Country：Japan
遷移金属原子を添加した銀クラスター正イオンAg_NM⁺（M =Sc–Ni）と一酸化窒素との反応: 添加元素によるサイズ依存性の変化

河野　知生, 堀岡正崇, 南川賢人, 西浦　隼, 西川享佑, 荒川雅, 寺嵜亨

日本化学会第98春季年会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県船橋市 Country：Japan
遷移金属原子を添加した銀クラスター負イオン AgNM− (M = Co, Ni)と酸素との反応性：2つのサイズ領域に現れる偶奇交替とそれらの起源

南川賢人, 堀岡正崇, 河野　知生, 荒川雅, 寺嵜亨

日本化学会第98春季年会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県船橋市 Country：Japan
金属酸化物クラスターの組成と金属原子の荷電状態

早川鉄一郎, 荒川雅, #安東航太, #清村侑矢, #河野知生, 寺嵜亨

第31回日本放射光学会年会・放射光科学合同シンポジウム 2018.1

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Event date： 2018.1

Language：Japanese

Country：Japan
アンモニアとの逐次反応によるタンタルクラスター正イオンの窒化

荒川雅, 安東航太, 藤本周平, 寺嵜亨, Saurabh Mishra, G. Naresh Patwari

第11回分子科学討論会 2017.9

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Event date： 2017.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：宮城県仙台市 Country：Japan
真空中で蒸発冷却された水液滴の凍結時間のサイズ依存性

安東航太, 荒川雅, 寺嵜亨

第11回分子科学討論会 2017.9

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Event date： 2017.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：宮城県仙台市 Country：Japan
酸素との反応性を介したニッケル添加銀クラスター負イオンの電子構造探究

南川賢人, 堀岡正崇, 河野　知生, 猿楽峻, 荒川雅, 寺嵜亨

第11回分子科学討論会 2017.9

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Event date： 2017.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：宮城県仙台市 Country：Japan
Adsorption and subsequent reaction of carbon monoxide and water molecules on silica and silicate cluster anions International conference

Masashi Arakawa, Akira Terasaki

Symposium "Evolution of Molecules in Space" 2017.6

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Event date： 2017.6

Language：English Presentation type：Oral presentation (general)

Venue：Sapporo Country：Japan
酸化珪素および珪酸塩(Mg-Si-O)クラスター負イオンの反応：星間空間での化学過程の解明を目指して

荒川雅, 寺嵜亨

ナノ学会　第15回大会 2017.5

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Event date： 2017.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道札幌市 Country：Japan
ニッケル添加銀クラスター負イオンAgNNi−と酸素との反応性

南川賢人, 堀岡正崇, 河野　知生, 猿楽峻, 荒川雅, 寺嵜亨

ナノ学会　第15回大会 2017.5

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Event date： 2017.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道札幌市 Country：Japan
Generation and Reaction of Mineral Clusters Related to Chemistry in the Interstellar Environment

荒川雅, 寺嵜亨

日本化学会第97春季年会 2017.3

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Event date： 2017.3

Language：English Presentation type：Oral presentation (general)

Venue：Yokohama, Japan Country：Japan
遷移金属原子を添加した銀クラスターイオンAgNM+（M =Sc–Ni）と酸素との反応性：添加元素によるサイズ依存性の変化

河野　知生, 猿楽峻, 松本　淳平, 荒川雅, 寺嵜亨

日本化学会第97春季年会 2017.3

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Event date： 2017.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan
Freezing process of a water droplet evaporatively cooled in a vacuum

安東　航太　, 荒川雅, 寺嵜亨

日本化学会第97春季年会 2017.3

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Event date： 2017.3

Language：English Presentation type：Oral presentation (general)

Venue：Yokohama, Japan Country：Japan
銅添加した酸化セリウムクラスター中の酸素原子の電子状態観測

早川鉄一郎, 荒川雅, 猿楽峻, 安東航太, 飛田健一朗, 清村侑矢, 烏田幸太朗, 寺嵜亨

第30回日本放射光学会年会・放射光科学合同シンポジウム 2017.1

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Event date： 2017.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
遷移金属原子をドープした銀クラスター（AgNM+）の反応：サイズに依存したs-d電子混成効果

安東　航太, 松本　淳平, 河野　知生, 荒川雅, 寺嵜亨

第10回分子科学討論会 2016.9

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Event date： 2016.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
珪酸塩（Mg, Fe-Si-O）クラスターと炭化水素等の生成に関わる分子との反応

荒川雅, 山根　崚, 寺嵜亨

第10回分子科学討論会 2016.9

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Event date： 2016.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
真空中で蒸発冷却された液滴の温度測定

安東　航太, 荒川雅, 寺嵜亨

第10回分子科学討論会 2016.9

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Event date： 2016.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan
Reaction of silicate clusters with CO and H2O as a model study of chemistry in the interstellar environment International conference

Masashi Arakawa, Akira Terasaki

18th International Symposium on Small Particles and Inorganic Clusters 2016.8

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Event date： 2016.8

Language：English Presentation type：Oral presentation (general)

Venue：Jyväskylä Country：Finland
Liquid droplets in a vacuum for wet chemistry of gas-phase clusters International conference

Kota Ando, Masashi Arakawa, Akira Terasaki

18th International Symposium on Small Particles and Inorganic Clusters 2016.8

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Event date： 2016.8

Language：English Presentation type：Oral presentation (general)

Venue：Jyväskylä Country：Finland
Optical absorption spectra of size-selected silver cluster cations: Size and temperature dependence International conference

Yuya Kiyomura, Kenichiro Tobita, Tomonori Ito, Masashi Arakawa, Akira Terasaki

18th International Symposium on Small Particles and Inorganic Clusters 2016.8

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Event date： 2016.8

Language：English Presentation type：Oral presentation (general)

Venue：Jyväskylä Country：Finland
Size-specific reactivity of transition-metal-doped silver clusters toward oxygen: Geometric and electronic effects International conference

Shun Sarugaku, Masashi Arakawa, Akira Terasaki, Jumpei Matsumoto, Tomoki Kawano

18th International Symposium on Small Particles and Inorganic Clusters 2016.8

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Event date： 2016.8

Language：English Presentation type：Oral presentation (general)

Venue：Jyväskylä Country：Finland
Freezing process of a supercooled water droplet in a vacuum International conference

Kota Ando, Masashi Arakawa, Akira Terasaki

International Symposium: Recent Progress in Molecular Spectroscopy and Dynamics 2016.7

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Event date： 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Reaction MglSinOm- with CO and H2O molecules: a model study of chemistry in the intestellar environments International conference

Masashi Arakawa, Akira Terasaki

International Symposium: Recent Progress in Molecular Spectroscopy and Dynamics 2016.7

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Event date： 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Size- and temperature-dependent optical absorption spectra of silver cluster cations International conference

Yuya Kiyomura, Kanichiro Tobita, Tomonori Ito, Masashi Arakawa, Akira Terasaki

International Symposium: Recent Progress in Molecular Spectroscopy and Dynamics 2016.7

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Event date： 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Size-specific reactivity of transition-metal-doped silver clusters with an oxygen molecule International conference

Shun Sarugaku, Jumpei Matsumoto, Tomoki Kawano, Masashi Arakawa, Akira Terasaki

International Symposium: Recent Progress in Molecular Spectroscopy and Dynamics 2016.7

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Event date： 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
銀クラスター正イオンの光吸収分光:スペクトルのサイズ依存性

清村　侑矢, 飛田　健一朗, 伊藤　智憲, 荒川雅, 寺嵜亨

ナノ学会第14回大会 2016.6

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Event date： 2016.6

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県北九州市小倉北区 Country：Japan
銀-遷移金属クラスターAgNM+と酸素分子との反応性のサイズ効果

河野知生, 猿楽峻, 村上遼平, 松本淳平, 荒川雅, 寺嵜亨

ナノ学会第14回大会 2016.6

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Event date： 2016.6

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京田辺市 Country：Japan
Generation and reaction of clusters with mineral compositions: a model study of chemistry in the interstellar environment Invited International conference

荒川雅

Seminar at Department of Chemistry, Indian Institute of Technology 2016.4

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Event date： 2016.4

Language：English Presentation type：Oral presentation (general)

Venue：Mumbai, India Country：India
遷移金属原子を添加した銀クラスターイオンと酸素分子との反応: 幾何構造と電子構造の効果

猿楽峻, 村上遼平, 松本淳平, 河野知生, 荒川雅, 寺嵜亨

日本化学会第９６春季年会 2016.3

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Event date： 2016.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京田辺市 Country：Japan
銀クラスター正イオン(8–35 量体)の光吸収分光:振動子強度の評価

清村　侑矢, 飛田　健一朗, 伊藤　智憲, 荒川雅, 寺嵜亨

日本化学会第９６春季年会 2016.3

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Event date： 2016.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京田辺市 Country：Japan
Optical absorption of size-selected free silver cluster ions in the size range up to 35 Invited International conference

Akira Terasaki, Kenichiro Tobita, Yuya Kiyomura, Tomonori Ito, Masashi Arakawa

Symposium on Size Selected Clusters 2016.2

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Event date： 2016.3

Language：English Presentation type：Oral presentation (general)

Venue：Davos Country：Switzerland
Photodissociation spectroscopy of silver cluster cations up to 35 atoms: Size and temperature dependence of spectral profiles International conference

Kcnichiro Tobita, Yuya Kiyomura, Tomonori Ito, Masashi Arakawa, Akira Terasaki

PACIFICHEM 2015 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Honolulu, HI Country：United States
Trapping a liquid micro-droplet in a vacuum toward wet chemistry of gas-phase clusters International conference

Kota Ando, Masashi Arakawa, Akira Terasaki

PACIFICHEM 2015 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Honolulu, HI Country：United States
Chemical reactivity of silver-cobalt binary cluster ions: Effects of geometric and electronic structures International conference

Shun Sarugaku, Masashi Arakawa, Akira Terasaki

PACIFICHEM 2015 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Honolulu, HI Country：United States
鉱物組成クラスターの生成と反応:鉱物表面反応の機構解明を目指して Invited

荒川雅, 山根　崚, 寺嵜亨

ナノ学会　ナノ構造・物性−ナノ機能・応用部会合同シンポジウム　「若い力が切り拓くナノサイエンス・テクノロジー」 2015.11

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Event date： 2015.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県福岡市 Country：Japan
酸化シリコンクラスター負イオンとCOとの反応サイト：鉱物表面反応の機構解明を目指して

荒川雅, 山根　崚, 寺嵜亨

第9回分子科学討論会 2015.9

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Event date： 2015.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都目黒区 Country：Japan
銀クラスター正イオン（8–35 量体）光吸収スペクトル測定：スペクトル形状のサイズ・温度依存性

清村　侑矢, 飛田　健一朗, 伊藤　智憲, 荒川雅, 寺嵜亨

第9回分子科学討論会 2015.9

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Event date： 2015.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都目黒区 Country：Japan
真空中で発生・捕捉した液滴の蒸発速度・凍結時間の測定

安東　航太, 荒川雅, 寺嵜亨

第9回分子科学討論会 2015.9

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Event date： 2015.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都目黒区 Country：Japan
イオントラップに蓄積した酸化セリウムクラスター(Ce3O4-7+) のX線吸収分光

早川鉄一郎, 荒川雅, 猿楽　峻, 安東　航太, 飛田　健一朗, 寺嵜亨

第15回分子分光研究会 2015.5

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Event date： 2015.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：福岡県福岡市 Country：Japan
酸化シリコンクラスター負イオンへのCO吸着サイト：原始惑星系での鉱物表面反応の機構解明を目指して

荒川雅, 山根崚, 寺嵜亨

ナノ学会第13回大会 2015.5

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Event date： 2015.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：宮城県仙台市 Country：Japan
銀クラスターの光解離分光:サイズ増加に伴う２光子過程の発現とスペクトルの形状変化

飛田健一朗, 清村　侑矢, 伊藤　智憲, 荒川雅, 寺嵜亨

ナノ学会第13回大会 2015.5

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Event date： 2015.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：宮城県仙台市 Country：Japan
銀クラスター正イオン(8–35量体)の光解離分光 : サイズ増加にともなう2光子吸収の発現

飛田　健一朗, 伊藤　智憲, 荒川雅, 寺嵜亨

日本化学会第95春季年会 2015.3

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Event date： 2015.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：千葉県船橋市 Country：Japan
真空下における液滴トラップ法の開発

安東航太, 荒川雅, 寺嵜亨

日本化学会第95春季年会 2015.3

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Event date： 2015.3

Language：Japanese

Venue：千葉県船橋市 Country：Japan
金-コバルト合金クラスターと酸素分子との反応におけるサイズ依存性

猿楽峻, 荒川雅, 寺嵜亨

日本化学会　第95春季年会 2015.3

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Event date： 2015.3

Language：Japanese

Venue：千葉県船橋市 Country：Japan
Ｘ線吸収分光による酸化セリウムクラスター(Ce3O4-7+)の電子状態分析

早川鉄一郎, 荒川雅, 猿楽　峻, 安東　航太, 飛田　健一朗, 伊藤　智憲, 江頭　和宏, 寺嵜亨

日本物理学会第70回年次大会 2015.3

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Event date： 2015.3

Language：Japanese

Venue：東京都新宿区 Country：Japan
X線吸収分光による酸化セリウムクラスター内原子の荷電状態分析

早川鉄一郎, 荒川雅, 猿楽　峻, 安東　航太, 飛田　健一朗, 伊藤　智憲, 江頭　和宏, 寺嵜亨

第28回日本放射光学会年会 2015.1

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Event date： 2015.1

Language：Japanese

Venue：滋賀県草津市 Country：Japan
酸素・水共存環境でのアルミニウムクラスターの反応：ボーキサイト組成クラスターの生成

荒川雅, 小原　佳, 寺嵜亨

第8回分子科学討論会 2014.9

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Event date： 2014.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：広島県東広島市 Country：Japan
Ｘ線吸収分光による酸化セリウムクラスターの電子状態分析

早川　鉄一郎, 荒川雅, 猿楽　峻, 安東　航太, 飛田　健一朗, 伊藤　智憲, 江頭　和宏, 寺嵜亨

第8回分子科学討論会 2014.9

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Event date： 2014.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：広島県東広島市 Country：Japan
銀クラスター正イオン8–20量体の光解離分光：サイズ増大によるスペクトルおよび解離過程の変化

伊藤　智憲, 飛田　健一朗, 荒川雅, 寺嵜亨

第8回分子科学討論会 2014.9

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Event date： 2014.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：広島県東広島市 Country：Japan
真空中に発生した液滴の蒸発速度と凍結過程

安東　航太, 荒川雅, 寺嵜亨

第8回分子科学討論会 2014.9

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Event date： 2014.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：広島県東広島市 Country：Japan
Reaction of aluminum cluster cations with a mixture of O2 and H2O gases: Formation of hydrated-alumina clusters International conference

Masashi Arakawa, Kei Kohara, Akira Terasaki

17th International Symposium on Small Particles and Inorganic Cluster 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Generation of a liquid droplet in a vacuum International conference

Kota Ando, Masashi Arakawa, Akira Terasaki

17th International Symposium on Small Particles and Inorganic Cluster 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Photodepletion spectroscopy of silver cluster cations in a temperature-controlled ion trap International conference

Tomonori Ito, Ken-ichiro Tobita, Masashi Arakawa, Akira Terasaki

17th International Symposium on Small Particles and Inorganic Cluster 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Space-focusing of spatially spread ions in time-of-flight mass spectrometer International conference

Shun Sarugaku, Masashi Arakawa, Akira Terasaki

17th International Symposium on Small Particles and Inorganic Cluster 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
X-ray absorption spectroscopy of size-selected cerium oxide clusters International conference

Tetsuichiro Hayakawa, Masashi Arakawa, Shun Sarugaku, Kota Ando, Kenichiro Tobita, Tomonori Ito, Kazuhiro Egashira, Akira Terasaki

17th International Symposium on Small Particles and Inorganic Cluster 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
水和アルミナクラスターの生成過程：鉱物表面での有機物生成反応の解明を目指して Invited

荒川雅

九重分光関連夏季セミナー 2014.7

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Event date： 2014.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：大分県玖珠郡九重町 Country：Japan
Photodissociation spectra of isolated silver cluster cations: size and temperature dependence International conference

Tomonori Ito, Kenichiro Tobita, Masashi Arakawa, Akira Terasaki

30th Symposium on chemical kinetics and dynamics 2014.6

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Event date： 2014.6

Language：English

Venue：Himeji, Hyogo Country：Japan
アルミニウムクラスター正イオンの解離、酸化、水酸化および水和過程：水・酸素混合気体との反応

荒川雅, 小原　佳, 寺嵜亨

ナノ学会第12回大会 2014.5

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Event date： 2014.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府宇治市 Country：Japan
イオントラップに蓄積したサイズ選別クラスターのX線吸収分光

早川　鉄一郎, 江頭　和宏, 荒川雅, 伊藤　智憲, 猿楽　峻, 安東　航太, 寺嵜亨

ナノ学会第12回大会 2014.5

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Event date： 2014.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府宇治市 Country：Japan
サイズ選別された金属酸化物クラスターイオンのX線吸収分光：酸化セリウムの局在電荷測定

荒川雅, 早川鉄一郎, 江頭和宏, 伊藤智憲, 猿楽峻, 安東航太, 寺嵜亨

日本化学会第94春季年会 2014.3

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Event date： 2014.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：愛知県名古屋市 Country：Japan
サイズ選別した酸化セリウムクラスター（Ce2O3+, Ce2O5+）のX線吸収分光

早川鉄一郎, 江頭和宏, 荒川雅, 伊藤智憲, 猿楽峻, 安東航太, 寺嵜亨

日本物理学会第69回年次大会 2014.3

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Event date： 2014.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：神奈川県平塚市 Country：Japan
アルミニウムクラスター正イオンと酸素/水混合気体の反応：水和化合物の生成過程

小原佳, 荒川雅, 寺嵜亨

日本化学会第94春季年会 2014.3

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Event date： 2014.3

Language：Japanese

Venue：愛知県名古屋市 Country：Japan
真空中における液滴の生成と蒸発冷却

安東航太, 荒川雅, 寺嵜亨

日本化学会第94春季年会 2014.3

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Event date： 2014.3

Language：Japanese

Venue：愛知県名古屋市 Country：Japan
酸化セリウムクラスター（Ce3O4+, Ce3O6+）のX線吸収分光

早川鉄一郎, 江頭和宏, 荒川雅, 伊藤智憲, 猿楽峻, 安東航太, 寺嵜亨

第27回日本放射光学会年会 2014.1

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Event date： 2014.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：広島県広島市 Country：Japan
X-ray spectroscopy of size-selected free metal-oxide clusters for oxidation-state analysis Invited International conference

Tetsuichiro Hayakawa, Kazuhiro Egashira, Masashi Arakawa, Tomonori Ito, Shun Sarugaku, Kota Ando, Akira Terasaki

Asian Consortium on Computational Materials Science 2014.1

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Event date： 2014.1

Language：English Presentation type：Oral presentation (general)

Venue：Sendai, Miyagi Country：Japan
イオントラップに蓄積した酸化セリウムクラスターのＸ線吸収測定

早川鉄一郎, 江頭和宏, 荒川雅, 伊藤智憲, 猿楽峻, 安東航太, 寺嵜亨

第7回分子科学討論会 2013.9

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Event date： 2013.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都府京都市 Country：Japan
アルミニウムクラスター正イオンと酸素・水混合気体との反応で生じる安定化学種の構造

小原佳, 荒川雅, 寺嵜亨

第7回分子科学討論会 2013.9

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Event date： 2013.9

Language：Japanese

Venue：京都府京都市 Country：Japan
線形イオントラップに捕捉した銀クラスター正イオンの光解離分光

伊藤智憲, 荒川雅, 寺嵜亨

第7回分子科学討論会 2013.9

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Event date： 2013.9

Language：Japanese

Venue：京都府京都市 Country：Japan
H2O および O2 との反応によるアルミニウムクラスター正イオンの解離、酸化、水和

荒川雅, 小原佳, 伊藤智憲, 寺嵜亨

ナノ学会第11回大会 2013.6

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Event date： 2013.6

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都目黒区 Country：Japan
銀クラスター正イオンへの窒素分子の逐次吸着：イオントラップを用いた反応測定

伊藤智憲, 谷口祐樹, 荒川雅, 寺嵜亨

ナノ学会第11回大会 2013.6

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Event date： 2013.6

Language：Japanese

Venue：東京都目黒区 Country：Japan
真空中への液滴導入法の開発

安東航太, 荒川雅, 寺嵜亨

ナノ学会第11回大会 2013.6

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Event date： 2013.6

Language：Japanese

Venue：東京都目黒区 Country：Japan
不均一な加速電場を用いた連続イオンビームの飛行時間型質量分析計

猿楽峻, 荒川雅, 寺嵜亨

ナノ学会第11回大会 2013.6

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Event date： 2013.6

Language：Japanese

Venue：東京都目黒区 Country：Japan
Reaction of size-selected aluminum cluster cations toward H2O and O2: Formation of stable products International conference

Kei Kohara, Masashi Arakawa, Tomonori Ito, Akira Terasaki

Workshop on Fundamentals and Applications of Laser Filaments 2013.4

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Event date： 2013.4

Language：English

Venue：Okazaki, Aichi Country：Japan
Sequential adsorption of nitrogen molecules on size-selected silver cluster cations International conference

Tomonori Ito, Yuki Taniguchi, Masashi Arakawa, Akira Terasaki

Workshop on Fundamentals and Applications of Laser Filaments 2013.4

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Event date： 2013.4

Language：English

Venue：Okazaki, Aichi Country：Japan
Improvement of Wiley-McLaren-type time-of-flight mass spectrometer for continuous ion beam International conference

Shun Sarugaku, Masashi Arakawa, Akira Terasaki

Workshop on Fundamentals and Applications of Laser Filaments 2013.4

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Event date： 2013.4

Language：English

Venue：Okazaki, Aichi Country：Japan
Liquid micro-droplet formation in a vacuum, Workshop on Fundamentals and Applications of Laser Filaments International conference

Kota Ando, Masashi Arakawa, Akira Terasaki

Workshop on Fundamentals and Applications of Laser Filaments 2013.4

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Event date： 2013.4

Language：English

Venue：Okazaki, Aichi Country：Japan
セリウム窒化物クラスター正イオンの生成と反応性の研究

伊藤圭樹, 伊藤智憲, 荒川雅, 寺嵜亨

日本化学会第93春季年会 2013.3

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Event date： 2013.3

Presentation type：Oral presentation (general)

Venue：滋賀県草津市 Country：Japan
連続クラスターイオンビームのサイズ分布分析を目的とした飛行時間型質量分析計

猿楽峻, 荒川雅, 寺嵜亨

日本化学会第93春季年会 2013.3

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Event date： 2013.3

Presentation type：Oral presentation (general)

Venue：滋賀県草津市 Country：Japan
アルミニウムクラスター正イオンと酸素及び水分子との反応で生じる安定生成物の同定とその生成条件

小原佳, 荒川雅, 寺嵜亨

日本化学会第93春季年会 2013.3

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Event date： 2013.3

Presentation type：Oral presentation (general)

Venue：滋賀県草津市 Country：Japan
共吸着水分子による金2量体正イオンへの O2 および CO 分子吸着の促

伊藤智憲, 荒川雅, 寺嵜亨

日本化学会第93春季年会 2013.3

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Event date： 2013.3 - 2013.2

Presentation type：Oral presentation (general)

Venue：滋賀県草津市 Country：Japan
Water-promoted molecular adsorption of O2 and CO on the gold dimer cation International conference

Tomonori Ito, Masashi Arakawa, and Akira Terasaki

Symposium on Size Selected Clusters 2013 2013.3

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Event date： 2013.3

Venue：Davos Country：Switzerland
連続的なイオンビームの分析を目的とする飛行時間型質量分析計の開発

猿楽峻, 荒川雅, 寺嵜亨

第6回分子科学討論会 2012.9

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Event date： 2012.9

Venue：東京都文京区 Country：Japan
アルミニウムクラスターの反応性と安定性: エッチング反応によるAl7+の生成

荒川雅, 小原佳, 伊藤智徳, 寺嵜亨

第6回分子科学討論会 2012.9

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Event date： 2012.9

Presentation type：Oral presentation (general)

Venue：東京都文京区 Country：Japan
共吸着効果による金クラスター正イオンへの酸素分子吸着の誘発

伊藤智憲, 伊藤圭樹, 安東航太, 荒川雅, 寺嵜亨

第6回分子科学討論会 2012.9

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Event date： 2012.9

Venue：東京都文京区 Country：Japan
アルミニウムクラスター正イオンと水分子との反応におけるサイズ依存性

荒川雅, 小原佳, 伊藤智徳, 寺嵜亨

ナノ学会第10回大会 2012.6

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Event date： 2012.6

Presentation type：Oral presentation (general)

Venue：大阪府豊中市 Country：Japan

Size Dependent Reaction of Aluminum Cluster Cations with Water Molecules
Reaction of size-selected aluminum cluster cations with water molecules International conference

K. Kohara, T. Ito, M. Arakawa, and A. Terasaki

Reaction of size-selected aluminum cluster cations with water molecules 2012.6

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Event date： 2012.6

Venue：Kasuga, Fukuoka, Japan Country：Japan
Structural and kinetics studies of nitrogen adsorption on silver cluster cations International conference

Y. Taniguchi, T. Ito, M. Arakawa, A. Terasaki

28th Symposium on chemical kinetics and dynamics 2012.6

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Event date： 2012.6

Venue：Kasuga, Fukuoka, Japan Country：Japan
Design of a TOF spectrometer for a continuous cluster ion beam International conference

S. Sarugaku, M. Arakawa, and A. Terasaki

28th Symposium on chemical kinetics and dynamics 2012.6

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Event date： 2012.6

Venue：Kasuga, Fukuoka, Japan Country：Japan
銀クラスター正イオンへの窒素分子の吸着過程

伊藤智徳, 谷口祐樹, 猿楽峻, 小原佳, 荒川雅, 寺嵜亨

日本化学会第92春季年会 2012.3

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Event date： 2012.3

Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan

Adsorption process of nitrogen on silver cluster cations
質量選別したアルミニウムクラスター正イオンと水分子との反応

荒川雅, 小原佳, 猿楽峻, 谷口祐樹, 伊藤智徳, 寺嵜亨

日本化学会第92春季年会 2012.3

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Event date： 2012.3

Presentation type：Oral presentation (general)

Venue：神奈川県横浜市 Country：Japan

Reactivity of size-selected aluminum cluster cations with water molecules
Hydrogen Ordering in Ice Observed from Neutron Diffraction and Reaction of Size-selected Aluminum Cluster Cations with Water Molecules International conference

Masashi Arakawa

Seminar at Research Group Professor Wöste, Fachbereich Physik der Freien Universität Berlin 2012.3

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Event date： 2012.3

Presentation type：Oral presentation (general)

Venue：Research Group Professor Wöste, Fachbereich Physik der Freien Universität Berlin Country：Germany
強誘電性氷の生成を促すメモリー効果の発見と惑星科学への応用 Invited

荒川雅, 鍵裕之, J. A. Fernandez-Baca, B. C. Chakoumakos, 深澤裕

第29回Grain Formation Workshop 2011.11

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Event date： 2011.11

Presentation type：Oral presentation (general)

Venue：兵庫県神戸市 Country：Japan

Hydrogen ordering in ice observed from neutron diffraction: Application to planetary science
Structure analysis of hydrogen-ordered ice XI using neutron powder diffraction and infrared spectroscopy International conference

Arakawa M., Kagi H. and Fukazawa H.

XVIII International Conference on "Horizons in Hydrogen Bond Research" 2009.9

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Event date： 2011.9

Venue：Paris, France Country：Japan
Formation condition of hydrogen-ordered ice XI: a neutron diffraction study International conference

Arakawa M., Kagi H. and Fukazawa H.

Horiba-ISSP International Symposium on Hydrogen and Water in Condensed Matter Physics 2009.10

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Event date： 2009.10

Country：Japan

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MISC

Chemistry of size- and composition-selected clusters and its application to planetary science Invited Reviewed

M. Arakawa

J. Mass Spectrom. Soc. Jpn. 2025.7

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Authorship：Lead author,　Last author,　Corresponding author
銀クラスター上での一酸化窒素分子の逐次反応：サイズに依存した反応経路

荒川雅, 寺嵜亨

Bull. Jpn. Soc. Coord. Chem. (錯体化学会誌) 2022.12

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
イオンビーム収束性能を向上させたリフレクトロン型飛行時間質量分析計の開発 Reviewed

#飯田岳史, 堀尾琢哉, 荒川雅, 寺嵜亨

ナノ学会会報 2022.11

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
アンモニアによるタンタルクラスター正イオンの窒化過程：5族元素窒化物の組成の起源の探究 Reviewed

荒川雅, ＠G. Naresh Patwari, 寺嵜亨

ナノ学会会報 2020.9

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
気相金属化合物クラスターの反応研究による宇宙分子進化へのアプローチ Reviewed

荒川雅

低温科学 2020.3

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)

DOI： 10.14943/lowtemsci.78.127
支部発話題欄 7「鉱物クラスターの反応研究で探る宇宙での化学過程：惑星系形成領域から惑星大気まで」 Invited Reviewed

荒川雅

化学と工業 77 ( 10 ) 692 - 693 2024.10

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Authorship：Lead author,　Corresponding author
最新のトピックス「鉱物クラスターの反応研究で探る宇宙での化学過程」 Invited

荒川雅, 寺嵜亨

化学 78 ( 8 ) 70 - 71 2023

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Authorship：Lead author,　Corresponding author
X線による孤立クラスターの電子状態計測

早川鉄一郎, 荒川雅, 寺嵜亨

光アライアンス 2016.3

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鉱物組成クラスターイオンの生成と反応：星間空間での化学反応のモデルとして

荒川雅

ナノ学会会報 2016.3

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
注目の論文「金属粒子中の磁性不純物原子の磁気状態：鍵は非磁性金属の自由電子数」 Invited

荒川雅

70 ( 8 ) 60 - 61 2015

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Authorship：Lead author,　Corresponding author
中性子回折測定による氷結晶の構造解明と惑星科学への応用

荒川雅, 鍵裕之, J. A. Fernandez-Baca, B. C. Chakoumakos, 深澤裕

日本惑星科学会誌遊星人 2011.12

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)

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Professional Memberships

The Japanese Society of Snow and Ice
The Japanese Society for Planetary Sciences
Japan Society for Molecular Science
The Chemical Society of Japan
Society of Nano Science and Technology

Committee Memberships

ナノ学会ナノ学会誌　編集委員 Domestic

2022.6 - 2024.6

Academic Activities

Screening of academic papers

Role(s)： Peer review

2024

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：4
第38回化学反応討論会実行委員 International contribution

38th Symposium on Chemical Kinetics and Dynamics （ Japan ） 2023.6

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Type：Competition, symposium, etc.

Number of participants：110
Screening of academic papers

Role(s)： Peer review

2023

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：4

Number of peer-reviewed articles in Japanese journals：1
Screening of academic papers

Role(s)： Peer review

2022

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：7

Number of peer-reviewed articles in Japanese journals：1
座長（Chairmanship）

日本化学会第101春季年会（ Japan ） 2021.3

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Type：Competition, symposium, etc.

Number of participants：10,000
実行委員

分子科学会オンライン討論会（ Japan ） 2020.9

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Type：Competition, symposium, etc.

Number of participants：1,000
懇親会の司会

ナノ学会第17回大会（ Japan ） 2019.5

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Type：Competition, symposium, etc.

Number of participants：100
ポスター賞審査員

ナノ学会第17回大会（ Japan ） 2019.5

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Type：Competition, symposium, etc.

Number of participants：100
Screening of academic papers

Role(s)： Peer review

2019

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：2
実行委員

第12回分子科学討論会（ Japan ） 2018.9

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Type：Competition, symposium, etc.

Number of participants：1,000
座長（Chairmanship）

日本化学会第98春季年会（ Japan ） 2018.3

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Type：Competition, symposium, etc.

Number of participants：10,000
優秀ポスター賞選考委員

第11回分子科学討論会（ Japan ） 2017.9

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Type：Competition, symposium, etc.

Number of participants：1,000
座長（Chairmanship）

第11回分子科学討論会（ Japan ） 2017.9

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Type：Competition, symposium, etc.

Number of participants：1,000
座長（Chairmanship）

日本化学会第97春季年会（ Japan ） 2017.3

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Type：Competition, symposium, etc.

Number of participants：10,000
優秀講演賞および学生講演賞の審査員

日本化学会第97春季年会（ Japan ） 2017.3

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Type：Competition, symposium, etc.

Number of participants：9,000
主催

新学術領域研究「宇宙における分子進化」第12回ワークショップ（ Japan ） 2016.10

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Type：Competition, symposium, etc.

Number of participants：15
優秀ポスター賞選考委員

第10回分子科学討論会（ Japan ） 2016.9

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Type：Competition, symposium, etc.

Number of participants：1,000
優秀ポスター賞選考委員

第8回分子科学討論会（ Japan ） 2014.9

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Type：Competition, symposium, etc.

Number of participants：1,000
Local Steering Committee International contribution

17th International Symposium on Small Particles and Inorganic Clusters （ Fukuoka Japan ） 2014.9

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Type：Competition, symposium, etc.

Number of participants：300
実行委員 International contribution

Workshop on Fundamentals and Applications of Laser Filaments （ Okazaki, Aichi Japan ） 2013.4

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Type：Competition, symposium, etc.
座長（Chairmanship） International contribution

The 17th East Asian Workshop on Chemical Dynamics （ Fukuoka Japan ） 2013.1

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Type：Competition, symposium, etc.
優秀ポスター賞選考委員

第6回分子科学討論会（ Japan ） 2012.9

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Type：Competition, symposium, etc.

Number of participants：1,000
第28回化学反応討論会実行委員 International contribution

28th Symposium on Chemical Kinetics and Dynamics （ Japan ） 2012.6

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Type：Competition, symposium, etc.
座長（Chairmanship）

第11回化学・材料研究セミナー（ Japan ） 2012.1

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Type：Competition, symposium, etc.
座長（Chairmanship）

第29回Grain Formation Workshop （ Japan ） 2011.11

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Type：Competition, symposium, etc.

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Research Projects

天然マントル資料の局所同位体分析によるマントルウェッジ炭素循環研究の新展開

2025.4 - 2030.3

科学研究費助成事業基盤研究(A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding
Experimental and computational studies on chemical reactions involving metal and metal-oxide clusters

2025.4 - 2026.3

Joint research

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Authorship：Principal investigator Grant type：Other funds from industry-academia collaboration
Investigation of reaction kinetics of molecules on metal and metal-oxide clusters

2025.4 - 2026.3

Joint research

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Authorship：Principal investigator Grant type：Other funds from industry-academia collaboration
気相クラスターの反応で探究する金属による水素･窒素活性化とアンモニア生成機構

2025.4 - 2026.3

UBE学術振興財団第65回学術奨励賞

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Authorship：Principal investigator Grant type：Competitive funding other than Grants-in-Aid for Scientific Research
気相クラスター反応と超高圧実験で探究する窒化セリウムによる窒素活性化機構

2024.11 - 2027.3

マツダ財団マツダ研究助成

福山鴻, 山本順司

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Authorship：Principal investigator Grant type：Competitive funding other than Grants-in-Aid for Scientific Research
Experimental and computational studies on chemical reactions involving metal and metal-oxide clusters

2023.4 - 2025.3

Joint research

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Authorship：Principal investigator Grant type：Other funds from industry-academia collaboration
Investigation of reaction kinetics of molecules on metal and metal-oxide clusters

2023.4 - 2025.3

Joint research

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Authorship：Principal investigator Grant type：Other funds from industry-academia collaboration
気相-液相融合によるナノ物質科学の新開拓:クラスターマテリアルの創製

Grant number：23K17349 2023 - 2027

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Challenging Research(Pioneering)

寺嵜亨, 堀尾琢哉, 荒川雅

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

本研究は、原子分子クラスターの中でも、物質の新たな構成要素となる可能性をもつ「超原子」に着目し、超原子クラスターが組織的に集積した「クラスターマテリアル」の創製およびその物性科学を推進する。特に、マテリアル創製において気相・液相の科学を融合した新たな方法論を開拓し、新規ナノ物質の創製に取り組む。一方、光や電子による先端的な分析技術で、構造解析と物性評価に取り組む。以上により、クラスターを基盤とする新たな物質設計論を構築し、ナノ物質科学を新展開に導く。

CiNii Research
鉱物クラスターを触媒とした惑星系形成環境でのC1化学

Grant number：23K22559 2022.4 - 2025.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

荒川雅, 山本順司, 寺嵜亨

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Grant type：Scientific research funding

惑星系形成領域の観測で様々な有機分子が発見され、その生成と進化過程の解明は星間化学研究の大きな課題の一つである。この問題に対し、工業化学や触媒研究で重要な、炭素数が1の化合物を原料に様々な化合物を相互に変換て創出するC1化学の知見を活用することを着想した。鉱物微粒子やクラスターを触媒としたC1化学が重要な役割を担ったのではないかとの仮説を立て、真空中に生成した酸化鉄、アルミナ、珪酸塩クラスターの反応観測に基づいて、その検証を行う。

CiNii Research
金属クラスター超原子の量子論構築に向けた電子過程・光学過程の探究

Grant number：22H00317 2022.4 - 2025.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

寺嵜亨, 堀尾琢哉, 荒川雅, 山口雅人

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Grant type：Scientific research funding

金属クラスター中の自由電子は、微小空間中で量子化された電子準位を占有し、原子と類似した電子殻構造を形成する。このような金属クラスターは原子との類似性から「超原子」と呼ばれ、物質の新たな構成要素として注目を集めている。本研究は、通常の原子と対比すべきこれら超原子の量子論構築に向けて、超原子クラスターの特性解明を進める。光電子画像分光法、光閉じ込め吸収分光法など独自の分光計測技術で電子過程・光学過程を探究し、超原子軌道に関わる量子特性を明らかにする。

CiNii Research
鉱物クラスターを触媒とした惑星系形成環境でのC1化学

Grant number：22H01288 2022 - 2024

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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Authorship：Principal investigator Grant type：Scientific research funding
金属クラスター超原子の量子論構築に向けた電子過程・光学過程の探究

Grant number：JP22H00317 2022 - 2024

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding
Exploring deeply supercooled liquid droplets in a vacuum

Grant number：21K18604 2021 - 2022

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Challenging Research(Exploratory)

TERASAKI Akira

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

We have explored deeply supercooled liquids of water and its dilute polyol solution by means of experiments based on liquid droplets in a vacuum along with theoretical approaches by molecular-dynamics simulation. Several properties of supercooled water were elucidated, including surface tension, viscosity, evaporation rates, homogeneous ice nucleation rates. Effects of polyol addition to the water were analyzed by focusing on delay in the freezing time as well as change in the hydration state. These achievements are expected to contribute to future development of science of matters in extreme environments.

CiNii Research
気相酸化鉄クラスターを触媒とした火星表層での化学反応

2021 - 2022

理学研究院若手支援令和１号資金若手支援プロジェクト

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Authorship：Principal investigator Grant type：On-campus funds, funds, etc.
Doping effect of rare-earth elements to metal clusters: s-f electron interactions in ultrafine metals

Grant number：19K05185 2019 - 2022

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Arakawa Masashi

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Authorship：Principal investigator Grant type：Scientific research funding

This study aimed at investigation of interaction between itinerant s electrons and localized d and f electrons with quantized density of states in the finite regime. We measured reaction kinetics of size-selected gas-phase lanthanide-doped silver clusters toward oxygen to probe their electronic structures. Our results revealed that d electrons of the dopant delocalize to contribute to electronic shell closure with s electrons, whereas f electrons remain localized not to contribute to the shell closure.

CiNii Research
局在性と非局在性の拮抗を解き明かす金属クラスターの電子論開拓

Grant number：JP18H03901 2018 - 2020

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding
鉱物クラスターの光化学反応：惑星表層での物質進化の探究

2018

QRプログラム・わかばチャレンジ

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Authorship：Principal investigator Grant type：On-campus funds, funds, etc.
水惑星学の創成

2017.6 - 2021.3

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Authorship：Coinvestigator(s)

水惑星学の創成
太陽系天体における水-氷相互作用

Grant number：17H06456 2017 - 2021

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas

関根康人, 谷篤史, 荒川雅, 野口直樹

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

惑星では太陽光に駆動された化学反応が起き、表面酸化が生じる。火星はこのような酸化を経験し、酸化鉄に覆われたといわれる。氷衛星では、酸化剤が氷地殻に取り込まれ地質活動に影響を与える。本研究では、火星はなぜ赤いのかと氷天体テクトニクスはなぜ多様性かという問いに取り組んだ。前者は、火星気候変動が駆動力となり、寒冷期の酸化剤の蓄積と温暖期の解放が酸化の鍵だとがわかった。後者は、氷に対する不純物の供給が、テクトニクスの二分性を引き起こすことがわかった。特に、内部海に対して上面から不純物が供給される場合は、表面更新が活発になり、内部海の下面から不純物が供給される場合、表面更新が乏しくなることがわかった。

CiNii Research
有機分子の生成と進化における鉱物クラスターの触媒作用

Grant number：16H00938 2016 - 2017

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas

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Authorship：Principal investigator Grant type：Scientific research funding
氷への物質の溶解の探究

Grant number：26870431 2014 - 2016

Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

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Authorship：Principal investigator Grant type：Scientific research funding
鉱物組成クラスターの気相反応による表面反応機構の探究

Grant number：26108510 2014 - 2015

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas

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Authorship：Principal investigator Grant type：Scientific research funding
鉱物表面での水の水素秩序化による有機物生成反応の促進

2014 - 2015

クリタ水・環境科学振興財団　国内研究助成

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Authorship：Principal investigator Grant type：Contract research
微小液滴を用いた氷への塩の溶解過程の観察

2012

九州大学教育研究プログラム・研究拠点形成プロジェクト

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Authorship：Principal investigator Grant type：On-campus funds, funds, etc.
気相クラスターの液相注入法の開発と反応・集積過程の研究

Grant number：23245006 2011 - 2014

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding
マントル流体の分光学的その場観察及びその地球化学的性質の解明

Grant number：08J03621 2008 - 2010

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

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Authorship：Principal investigator Grant type：Scientific research funding
気相クラスター反応と超高圧実験で探究する窒化セリウムによる窒素活性化機構

マツダ財団マツダ研究助成

荒川雅

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Class subject

構造・量子化学実験

2023.10 - 2024.3 Second semester
基本操作法

2023.10 - 2024.3 Second semester
構造・量子化学実験

2022.10 - 2023.3 Second semester
基本操作法

2022.10 - 2023.3 Second semester
構造・量子化学実験

2021.10 - 2022.3 Second semester
基本操作法

2021.10 - 2022.3 Second semester
化学序説

2021.4 - 2021.9 First semester
構造・量子化学実験

2020.10 - 2021.3 Second semester
基本操作法

2020.10 - 2021.3 Second semester
基本操作法

2019.10 - 2020.3 Second semester
構造・量子化学実験

2019.10 - 2020.3 Second semester
構造・量子化学実験

2018.10 - 2019.3 Second semester
基本操作法

2018.10 - 2019.3 Second semester
化学序説

2018.4 - 2018.9 First semester
基本操作法

2017.10 - 2018.3 Second semester
構造・量子化学実験

2017.10 - 2018.3 Second semester
構造・量子化学実験

2016.10 - 2017.3 Second semester
基本操作法

2016.10 - 2017.3 Second semester
構造・量子化学実験

2015.10 - 2016.3 Second semester
基本操作法

2015.10 - 2016.3 Second semester
フロンティア科学I

2015.10 - 2016.3 Second semester
化学序説

2015.4 - 2015.9 First semester
構造・量子化学実験

2014.10 - 2015.3 Second semester
基本操作法

2014.10 - 2015.3 Second semester
構造・量子化学実験

2013.10 - 2014.3 Second semester
基本操作法

2013.10 - 2014.3 Second semester
構造・量子化学実験

2012.10 - 2013.3 Second semester
化学実験基本操作法

2012.10 - 2013.3 Second semester
構造・量子化学実験

2011.10 - 2012.3 Second semester
化学実験基本操作法

2011.10 - 2012.3 Second semester

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FD Participation

2022.7 Role：Participation Title：電子ジャーナルに関するFD

Organizer：Undergraduate school department
2018.3 Role：Participation Title：学生におこりやすい問題とその対応ー発達障害を中心にー

Organizer：Undergraduate school department
2016.3 Role：Participation Title：学生との接し方について

Organizer：[Undergraduate school/graduate school/graduate faculty]
2015.3 Role：Participation Title：教育と著作権

Organizer：[Undergraduate school/graduate school/graduate faculty]
2014.7 Role：Participation Title：改定ＧＰＡ制度の実施のためのＦＤ

Organizer：[Undergraduate school/graduate school/graduate faculty]
2014.3 Role：Participation Title：平成25年度化学部門ＦＤ・ＨＤ講演会「化学科・化学専攻における留学生に関わる諸問題」

Organizer：[Undergraduate school/graduate school/graduate faculty]
2013.3 Role：Participation Title：九州大学大学院理学研究院化学部門・理学研究院　共同開催平成２４年度ＦＤ・ＨＤ講演会「アクティブ・ラーニング：入門と実践」

Organizer：[Undergraduate school/graduate school/graduate faculty]
2012.5 Role：Participation Title：平成24年度第2回全学FD

Organizer：University-wide
2012.1 Role：Participation Title：平成 23 年度教育の質向上支援プログラム　外国人教員による英語教育

Organizer：[Undergraduate school/graduate school/graduate faculty]
2011.3 Role：Other Title：平成 23 年度教育の質向上支援プログラム　海外での実践英語教育

Organizer：[Undergraduate school/graduate school/graduate faculty]

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Outline of Social Contribution and International Cooperation activities

中学生向け新聞におけるコラム執筆（研究紹介、本の紹介など）
日印二国間共同研究への参加

Social Activities

ピカリかがく実験箱～身近な「光」をよく見てみよう！～

Role(s)：Organizing member

科学技術振興機構サイエンスアゴラ 2024.10
支部発話題欄 7「鉱物クラスターの反応研究で探る宇宙での化学過程：惑星系形成領域から惑星大気まで」

Role(s)：Contribution

日本化学会化学と工業 2024.10
「原子の数を制御して化学反応のメカニズムに迫る!」～身の回りから宇宙まで～

Role(s)：Lecturer

公益財団法人九州経済調査協会第104回サイエンスカフェ＠ふくおか 2024.9
最新のトピックス「鉱物クラスターの反応研究で探る宇宙での化学過程」

Role(s)：Contribution

化学同人化学 2023
令和3年度九州大学理学部先端自然科学講演会令和3年度福岡県高等学校理科部会夏季研修会

九州大学理学部・福岡県高等学校理科部会オンライン 2021.8

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Audience：General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture
見えないものを見てみよう：幼稚園での実験

幼稚園 2019.1

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Audience：Infants,　Schoolchildren,　Junior students,　High school students

Type：Seminar, workshop
第90回化学への招待「レーザーを手作りしよう」

日本化学会九州支部九州大学伊都キャンパス 2016.12

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Audience：General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Other
注目の論文「金属粒子中の磁性不純物原子の磁気状態：鍵は非磁性金属の自由電子数」

Role(s)：Contribution

化学同人化学 2015
第73回化学への招待「レーザーを手作りしよう」

日本化学会九州支部九州大学箱崎キャンパス 2012.10

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Audience：General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Other
第７３回化学への招待「レーザーを手作りしよう」

日本化学会九州支部 2012.10

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Audience：Infants,　Schoolchildren,　Junior students,　High school students

Type：Seminar, workshop
朝日中学生ウィークリー春の研究室見学

朝日学生新聞社 2008.3

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Audience：Infants,　Schoolchildren,　Junior students,　High school students

Type：Seminar, workshop
朝日中学生ウィークリー夏企画研究室見学

朝日学生新聞社 2007.8

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Audience：Infants,　Schoolchildren,　Junior students,　High school students

Type：Seminar, workshop

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Media Coverage

最新の研究紹介記事鉱物クラスターの反応研究で探る宇宙での化学過程 Newspaper, magazine

化学同人「化学」 2023.8

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最新の研究紹介記事
鉱物クラスターの反応研究で探る宇宙での化学過程
最新の論文紹介記事金属粒子中の磁性不純物原子の磁気状態：鍵は非磁性金属の自由電子数 Newspaper, magazine

化学同人「化学」 2015.8

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最新の論文紹介記事
金属粒子中の磁性不純物原子の磁気状態：鍵は非磁性金属の自由電子数
究極の極微小物質「クラスター」で探る分子進化：鉱物クラスターの生成と反応機構 Newspaper, magazine

九州大学理学部便り 2015.8

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究極の極微小物質「クラスター」で探る分子進化：鉱物クラスターの生成と反応機構
研究成果に関する記事 Newspaper, magazine

科学新聞 2011.9

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研究成果に関する記事
研究成果に関する記事 Newspaper, magazine

New Scientist 2011.8

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研究成果に関する記事
研究成果に関する記事 Newspaper, magazine

科学新聞 2009.10

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研究成果に関する記事
研究成果に関する記事 Newspaper, magazine

日刊工業新聞 2009.10

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研究成果に関する記事
研究成果に関する記事 Newspaper, magazine

日経産業新聞 2009.10

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研究成果に関する記事

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Activities contributing to policy formation, academic promotion, etc.

2014.4 - 2023.3 文部科学省科学技術・学術政策研究所

NISTEP専門調査員

Travel Abroad

2016.4

Staying countory name 1：India Staying institution name 1：Indian Institute of Technology
2016.4

Staying countory name 1：India Staying institution name 1：Indian Institute of Technology, Bombay
2016.3

Staying countory name 1：Germany Staying institution name 1：Helmholtz Center Berlin

Staying institution name 2：Technische Universität Berlin
2015.3

Staying countory name 1：Germany Staying institution name 1：Helmholtz Center Berlin

Staying institution name 2：Technische Universität Berlin
2014.1

Staying countory name 1：India Staying institution name 1：Bhabha Atomic Research Centre

Staying institution name 2：Indian Institute of Technology, Bombay

Staying institution name 3：Tata Institute of Fundamental Research
2012.3

Staying countory name 1：Germany Staying institution name 1：Research Group Professor Wöste Fachbereich Physik der Freien Universität Berlin

Staying institution name 2：Fritz-Haber-Institut der Max-Planck-Gesellschaft

Staying institution name 3：Helmholtz-Zentrum Berlin
2010.3

Staying countory name 1：United States Staying institution name 1：Oak Ridge National Laboratory
2009.8

Staying countory name 1：Other Staying institution name 1：Oak Ridge National Laboratory
2009.2 - 2009.3

Staying countory name 1：United States Staying institution name 1：Oak Ridge National Laboratory
2008.7

Staying countory name 1：United States Staying institution name 1：UC Berkeley

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