Kyushu University Academic Staff Educational and Research Activities Database
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KAORU TAMADA Last modified date:2020.07.02



Graduate School
Administration Post
Vice President


Homepage
https://kyushu-u.pure.elsevier.com/en/persons/kaoru-tamada
 Reseacher Profiling Tool Kyushu University Pure
http://www.cm.kyushu-u.ac.jp/ktamada/index.html
研究室HP .
Academic Degree
Doctor of Science
Country of degree conferring institution (Overseas)
No
Field of Specialization
Surface Physical Chemistry, Nanoscience
ORCID(Open Researcher and Contributor ID)
0000-0003-2618-9924
Total Priod of education and research career in the foreign country
07years00months
Outline Activities
[University activities] As a Vice-President of Kyushu University, she has been in charge of promotion of gender equality and student support. Especially, she is engaged in activities to promote the success of female and young researchers and strengthen their research capabilities. In FY 2019, she has launched the Diversity and Super Global Training Program (SENTAN-Q) in the "Diversity Research Environment Initiative (advanced)" under the MEXT's human resources development project for science and technology. She is also in charge of the dual hiring system for Scientist couples, the gender analysis for research achievement, the establishment of Kyushu University outstanding female researcher award (Sanae Ito prize) and also contributed to the 1st Jun Ashida award. She has been working hard to visualize the success of female researchers at Kyushu University. [Research Activities] Leading the Laboratory for "Nanomaterials and Interfaces" in the Institute for Materials Chemistry and Engineering, she has been conducting research on the development of new functional materials by self-assembly of molecules and nanoparticles. Surface plasmon resonance (propagating and localized) are the main subject in these years. Plasmonic devices using nanomaterials are expected to be an important tool for high-sensitive and high-resolution detection and imaging for nanointerfacial phenomenon. Recent topics include research on electro-magnetically induced transparency (EIT) in self-assembled 3D metamaterials (Grants-in-aid for KIBAN S) and high-resolution fluorescence live-cell imaging on the 2D metasurface (Grants-in-aid for KIBAN S). She was awarded in 2013 Surface Science Society of Japan (SSSJ) Fellow, 2016 Japan Society of Applied Physics (JSAP) Fellow, and First Award in 2018 SSSJ. [Educational activities] She belongs to the Department of Chemistry, Graduate School of Science, and participates the education of undergraduate and graduate students in doctoral and master's programs. The class of "Nanomaterials and Interfaces I" for graduate students is an active learning class with a group-discussion, where students can learn surface science and nanoscience from basic to applications. She was also teaching a class for undergraduates "Daily Chemistry" for several years, that is also PBL-type active learning class. The percentage of female students going on to doctorate is quite high in her lab (5/8). [International activities] Long-term joint research with the National University of Singapore (NUS) has ranged from high-sensitive surface characterization with synchrotron system to synthesis and self-assembly of semiconductor nanoparticles. Other international collaborators are, for example, Australian National University, KAUST, and Heidelberg University in Germany. She has been organizing international conferences on a regular basis. She is a member of editorial Adviser Board, ACS Applied Nano Materials, ACS. [Social Activities] Her social activities in Scientific society are mostly on JSAP, SSSJ and the Japan Society of Vacuum & Surface Science (JSVSS). She was the first female chair of the Molecular Electronics & Bioelectronics division in JSAP, and also the Editor-in-Chief of JSAP Journal. She launched the Kyushu division at SSSJ, and also built up Diversity division at JSVSS. She is a member of the Science Council of Japan, the Vision Development Committee, PEAKS in the Cabinet Office, and the PBL Education Promotion Task Force committee for Society 5.0.
Research
Research Interests
  • Super resolution Live-cell imaging of cell-attached nano interface using LSPR sheet
    keyword : Localized surface plasmon resonance (LSPR), Enhanced Fluorescence, live-cell imaging, super resolution
    2019.08~2024.03.
  • Naked-eye full Color Plasmon Sensor for Early Detection of Heart Disease
    keyword : Colorimetric sensor, metamaterials
    2018.07~2019.06.
  • Innovative NanoBio Detection with Plasmon Nanoannena
    keyword : Nanoparticles, Self-assembly, Nano optical devices, Single molecule imaging, Biochip
    2011.02~2014.03.
  • The development of a fluidic laser via the coupling of semiconductor nanostructures with a self-assembled optical cavity
    keyword : quantum dots, plasmon, micro-fluid cell, biosensing
    2015.04~2017.03.
  • Creation of complex 3D nanometamaterials
    keyword : Metallic nanoparticles, self-asssembly, plasmonics, metamaterial
    2014.04~2018.03.
Academic Activities
Papers
1. J. Leng, Y. Xu, Y-T. Chan, P. Wang, S. Ryuzaki, K. Okamoto & K. Tamada, Tuning the Emission Colors of Self-Assembled Quantum Dot Monolayers via One-Step Heat Treatment for Display Applications, ACS Appl. Nano Mater., 10.1021/acsanm.9b02358, 3, 3214-3222, 2020.02.
2. Junfu Leng, Tian Wang, Xiaofei Zhao, Evon Woan Yuann Ong, Baisheng Zhu, Jun De Andrew Ng, Ying Chieh Wong, Khoong Hong Khoo, Kaoru Tamada, Zhi Kuang Tan, Thermodynamic Control in the Synthesis of Quantum-Confined Blue-Emitting CsPbBr3 Perovskite Nanostrips, Journal of Physical Chemistry Letters, 10.1021/acs.jpclett.9b03873, 11, 6, 2036-2043, 2020.03, Size control is critical in the synthesis of quantum-confined semiconductor nanocrystals, otherwise known as quantum dots. The achievement of size-uniformity and narrow spectral line-width in quantum dots conventionally relies on a very precise kinetic control of the reactions, where reaction time plays a significant role in defining the final crystal sizes and distribution. Here, we show that synthesis of quantum-confined perovskite nanostrips could be achieved through a thermodynamically controlled reaction, using a low-temperature and ligand-rich approach. The nanostrip growth proceeds through an initial one-dimensional (1D) nanorod stage, followed by the lateral widening of the rod to form a two-dimensional (2D) nanostrip. The spectral characteristics of the final product remain unchanged after prolonged reaction, indicating no signs of crystal ripening and confirming the thermodynamic nature of this reaction. The CsPbBr3 perovskite nanostrips were highly uniform and emit at a deep-blue wavelength of 462 nm with a remarkably narrow line-width of 13 nm. This corresponds to color coordinates of (0.136, 0.049) on the CIE 1931 color space, which fulfils the stringent Rec. 2020 standard for next-generation color displays. The well-passivated nanostrips also possess negligible defects and provide a near-unity photoluminescence quantum yield at 94%. Crucially, the achievement of blue emission through a pure-halide perovskite circumvents the problems of spectral instability that are frequently experienced in mixed-halide perovskite systems. The convenience and scalability of our thermodynamic approach, coupled with the excellent optical attributes, would likely enable these quantum-confined perovskite systems to be the preferred method toward color control in trichromatic display applications..
3. Pangpang Wang, Soh Ryuzaki, Lumei Gao, Shuhei Shinohara, Noboru Saito, Koichi Okamoto, Kaoru Tamada, Sunao Yamada, Comparison of the mechanical strength of a monolayer of silver nanoparticles both in the freestanding state and on a soft substrate, Journal of Applied Physics, 10.1063/1.5063567, 125, 13, 134301, 2019.04, A 7-nm-thick monolayer comprising myristate-capped silver nanoparticles (AgNPs) was fabricated by first drop casting an AgNP solution on the surface of a 10-100 μl water drop placed on a solid substrate. With the natural evaporation of the water, a monolayer slowly descended onto the substrate, the latter containing an array of 2.5-μm-diameter and 200-nm-deep holes, and finally formed circular freestanding monolayers in the holes. Nanoindentation measurement based on atomic force microscopy was carried out on the circular freestanding monolayer at its center, and the extending and retracting force-indentation curves were recorded to analyze further the mechanical properties of the monolayer. The force-indentation curves were evidently nonlinear, and so a two-term continuum-mechanics theory was used to interpret the results. By fitting the force-indentation curves using a two-term equation, the prestress and Young’s modulus of the freestanding AgNP monolayer were obtained as approximately 0.05 N/m and several gigapascals, respectively, which are consistent with the results reported in the literature. For comparison, we also studied the mechanical responses of AgNP monolayers and bilayers on a soft polydimethylsiloxane (PDMS) substrate by using nanoindentation. Because the AgNP monolayer was stiffer than the PDMS substrate, it was possible to measure the mechanical response of the former despite it being only 7 nm thick. The mechanical strength of the freestanding AgNP monolayers was considered to be dominated by the attractive interactions between the interdigitated hydrocarbon chains of the myristate..
4. Ayumi Ishijima, Pangpang Wang, Soh Ryuzaki, Koichi Okamoto, Kaoru Tamada, Comparison of LSPR-mediated enhanced fluorescence excited by S- and P-polarized light on a two-dimensionally assembled silver nanoparticle sheet, Applied Physics Letters, 10.1063/1.5056211, 113, 17, 171602, 2018.10, Localized surface plasmon resonance (LSPR) excited by an oblique incidence of S- and P-polarized light to a two-dimensionally assembled silver nanoparticle sheet was investigated via enhanced fluorescence under total internal reflection fluorescence (TIRF) microscopy. The finite-difference-time-domain simulation demonstrated that the S-polarized light induced a strong plasmon coupling at a nanogap between the particles, which eventually led to a highly confined, strong, and "flattened" electric field on the entire surface. In contrast, the LSPR field excited by P-polarized light was located on the individual particles, having a relatively long tail in the axial direction (low confinement). The LSPR-mediated fluorescence appeared stronger under P-polarized light than under S-polarized light in the experiments using cyanine dye solutions, while the opposite result was obtained for the fluorescence bead snapshot (diameter: 200 nm). Magnified images of the single beads taken by a super-resolution digital CMOS camera (65 nm/pixel) revealed improved lateral resolution when S-polarized light was used on both the silver nanoparticle sheet and glass under TIRF microscopy..
5. Shihomi Masuda, Salomé Mielke, Federico Amadei, Akihisa Yamamoto, Pangpang Wang, Takashi Taniguchi, Kenichi Yoshikawa, Kaoru Tamada, Motomu Tanaka, Nonlinear Viscoelasticity of Highly Ordered, Two-Dimensional Assemblies of Metal Nanoparticles Confined at the Air/Water Interface, Langmuir, 10.1021/acs.langmuir.8b02713, 34, 43, 13025-13034, 2018.10, In this study, we investigated the viscoelastic properties of metal nanoparticle monolayers at the air/water interface by dilational rheology under periodic oscillation of surface area. Au nanoparticles capped with oleylamine form a stable, dense monolayer on a Langmuir film balance. The stress response function of a nanoparticle monolayer was first analyzed using the classical Kelvin-Voigt model, yielding the spring constant and viscosity. The obtained results suggest that the monolayer of nanoparticles is predominantly elastic, forming a two-dimensional physical gel. As the global shape of the signal exhibited a clear nonlinearity, we further analyzed the data with the higher modes in the Fourier series expansion. The imaginary part of the higher mode signal was stronger than the real part, suggesting that the dissipative term mainly causes the nonlinearity. Intriguingly, the response function measured at larger strain amplitude became asymmetric, accompanied by the emergence of even modes. The significance of interactions between nanoparticles was quantitatively assessed by calculating the potential of mean force, indicating that the lateral correlation could reach up to the distance much larger than the particle diameter. The influence of surface chemical functions and core metal has also been examined by using Au nanoparticles capped with partially fluorinated alkanethiolate and Ag nanoparticles capped with myristic acid. The combination of dilational rheology and correlation analyses can help us precisely control two-dimensional colloidal assembly of metal nanoparticles with fine-adjustable localized surface plasmon resonance..
6. Mamoru Tamura, Koichi Okamoto, Kaoru Tamada, Takuya Iida, Stochastic approach to simulation of evaporation-triggered multiple self-assembly of mixed metal nanoparticles and their variable superradiance, Applied Physics Letters, 10.1063/1.5005830, 112, 3, 33106, 2018.01, We developed a design principle for the evaporation-triggered heterogeneous assembly of different kinds of metal nanoparticles in a two-dimensional environment. A dynamic Monte Carlo simulation shows the formation of island structures of gold nanoparticles (gold islands) surrounded by smaller silver nanoparticles (silver matrix) during the evaporation of organic solvent from the dispersion liquid on the water surface. Our developed principle revealed the spontaneous change in multiple interactions between gold and silver nanoparticles owing to the presence or the absence of solvation repulsion, which plays a crucial role in the formation of gold islands in the silver matrix. Not only the randomly arranged gold islands, but also the surrounding silver matrix phase contributed to the wavelength-tunable light scattering enhanced by a factor of 102 due to the superradiance effect. These results will pave the way for the design of multicolored optical devices based on random plasmonics via controlled interparticle interactions..
7. Eiji Usukura, Yuhki Yanase, Ayumi Ishijima, Thasaneeya Kuboki, Satoru Kidoaki, Koichi Okamoto, Kaoru Tamada, LSPR-mediated high axial-resolution fluorescence imaging on a silver nanoparticle sheet, PLoS One, 10.1371/journal.pone.0189708, 12, 12, 2017.12, This paper reports our original technique for visualizing cell-attached nanointerfaces with extremely high axial resolution using homogeneously excited localized surface plasmon resonance (LSPR) on self-assembled silver nanoparticle sheets. The LSPR sheet can confine and enhance the fluorescence at the nanointerface, which provides high signal-to-noise ratio images of focal adhesion at the cell-attached interface. The advantage of this LSPR-assisted technique is its usability, which provides comparable or higher-quality nanointerfacial images than TIRF microscopy, even under epifluorescence microscopy. We also report the cytotoxicity of silver nanoparticles, as determined via morphological analysis of adherent cells on the sheet..
8. S. Masuda, Y. Yanase, E. Usukura, S. Ryuzaki, K. Okamoto, KUBOKI THASANEEYA, S. Kidoaki, Kaoru Tamada, High-resolution imaging of a cell- attached nanointerface using a gold-nanoparticle two-dimensional sheet, Sci. Rep., 7, 3720, 1-10, 2017.07, This paper proposes a simple, effective, non-scanning method for the visualization of a cell-attached nanointerface. The method uses localized surface plasmon resonance (LSPR) excited homogeneously on a two-dimensional (2D) self-assembled gold-nanoparticle sheet. The LSPR of the gold-nanoparticle sheet provides high-contrast interfacial images due to the confined light within a region a few tens of nanometers from the particles and the enhancement of fluorescence. Test experiments on rat basophilic leukemia (RBL-2H3) cells with fluorescence-labeled actin filaments revealed high axial and lateral resolution even under a regular epifluorescence microscope, which produced higher quality images than those captured under a total internal reflection fluorescence (TIRF) microscope. This non-scanning-type, high-resolution imaging method will be an effective tool for monitoring interfacial phenomena that exhibit relatively rapid reaction kinetics in various cellular and molecular dynamics..
9. Z-Y. Juang, C-C Tseng, Y. Shi, W-P Hsieh, Sou Ryuzaki, N. Saito, C.-E Hsiung, Y. Hernandez, Y. Han, Kaoru Tamada, L-J L, Graphene-Au nanoparticle based vertical heterostructures: A novel route towards high-ZT Thermoelectric devices, Nano Energy, 38, 385-391, 2017.04.
10. K. Okamoto, D. Tanaka, R. Degawa, X. Li, PANGPANG WANG, Sou Ryuzaki, Kaoru Tamada, Electromagnetically induced transparency of a plasmonic metamaterial light absorber based on multilayered metallic nanoparticle sheets, Sci. Rep. , 6, 36165, 2016.09.
11. Ryo degawa, Pangpang Wang, Daisuke Tanaka, S. Park, N.Sakai, T. Tatsuma, Koichi Okamoto, Kaoru Tamada, Colorimetric detection of an airborne remote photocatalytic reaction using a stratified Ag nanoparticle Sheet, Langmuir, 32, 8154-8162, 2016.04.
12. Pangpang Wang, Daisuke Tanaka, Shohei Araki, K. Okamoto, Kaoru Tamada, Silver nanoparticles with tunable work functions, Applied Physics Letters, 107, 151601-1-151601-5, 2015.10.
13. Shuhei Shinohara, Daisuke Tanaka, Koichi Okamoto, Kaoru Tamada, Colorimetric plasmon sensors with multilayered metallic nanoparticle sheets, Phys. Chem. Chem. Phys., 17, 18606-18612, 2015.07.
14. Daisuke Tanaka, Keisuke Imazu, Jinwoo Sung, Cheolmin Park, K. Okamoto, Kaoru Tamada, Characteristics of localized surface plasmons excited on mixed monolayers composed of self-assembled Ag and Au nanoparticles, Nanoscale, DOI: 10.1039/c5nr03601a, 7, 15310-15320, 2015.06.
15. PANGPANG WANG, Koichi Okamoto, Kaoru Tamada, Tuning the work functions of two-dimensional silver nanoparticle sheets using local oxidation nanolithography, Adv. Mater. Interfaces, 1400268, 2014.12.
16. E. Usukura, S. Shinohara, K. Okamoto, J. Lim, K. Char, K. Tamada, Highly confined, enhanced surface fluorescence imaging with two-dimensional silver nanoparticle sheets, Applied Physics Letters, 104, 121906, 2014.03.
17. Koichi Okamoto, Brian Lin, Keisuke Imazu, Akihito Yoshida, Koji Toma, Mana Toma, Kaoru Tamada, Tuning colors of silver nanoparticle sheets by multilayered crystalline structures on metal substrates, Plasmonics, 8, 581, 2013.04.
18. Akihito Yoshida, Keisuke Imazu, Xinheng Li, Koichi Okamoto, Kaoru Tamada, Spectroscopic Properties of Multilayered Gold Nanoparticles 2D Sheets, Langmuir, 28, 17153, 2012.11.
19. Kim HW, Jung J, Han MN, Lim S, Tamada K, Hara M, Kawai M, Kim Y, Kuk Y , One-Dimensional Molecular Zippers , J. Am. Chem. Soc., 10.1021/ja2031486, 133, 24, 9236-9238, 2011.04.
20. Mana Toma, Koji Toma, Kanae Michioka, Yasuhiro Ikezoe, Daiki Obara, Koichi Okamoto and Kaoru Tamada, Collective plasmon modes excited on a silver nanoparticle 2D crystalline sheet, Phys. Chem. Chem. Phys., 10.1039/c0cp02953j, 13, 7459-7466, 2011.02.
21. Kim HW, Han, M, Shin HJ, Lim S , Oh Y, Tamada K , Hara M , Kim Y, Kawai M, Kuk Y, Control of Molecular Rotors by Selection of Anchoring Sites , Phys. Rev. Lett., 10.1103/PhysRevLett.106.146101, 106, 14, 146101, 2011.01.
22. Satoshi Katano, Koji Toma, Mana Toma, Kaoru Tamada and Yoichi Uehara, Nanoscale coupling of photons to vibrational excitation of Ag nanoparticle 2D array studied by scanning tunneling microscope light emission spectroscopy, Phys. Chem. Chem. Phys., 10.1039/c0cp01005g, 12, 44, 14749-14753, 2010.08.
23. T. Nagahiro, K. Ishibashi, Y. Kimura, M. Niwano, T. Hayashi, Y. Ikezoe, M. Hara, T. Tatsuma, K. Tamada, Ag nanoparticle sheet as a marker of lateral remote photocatalytic reaction, Nanoscale, 10.1039/b9nr00240e, 2, 107-113, 2009.11.
24. T. Nagahiro, H. Akiyama, M. Hara, K. Tamada, Photoisomerization of azobenzene containing self-assembled monolayers investigated by Kelvin probe work function measurements, J. Electron Spectroscopy and Related Phenomena, 172, 1-3, 128-133, 2009.07.
25. C.-D. Keum, N. Ishii, K. Michioka, K. Tamada, M. Hara, M. Furusawa, H. Fukushima, A Gram Scale Synthesis of Monodispersed Silver Nanoparticles Capped by Carboxylate and Their Ligand Exchange, J. Nonlinear Optical Physics & Materials, 17, 131-142, 2008.07.
26. Ito M, Nakamura F, Baba A, Tamada K, Ushijima H, Lau KHA , Manna A, Knoll W, Enhancement of surface plasmon resonance signals by gold nanoparticles on high-density DNA microarrays, J. Phys. Chem. C, 111, 31, 11653-11662, 2007.07.
Presentations
1. Kaoru Tamada, Self-Assembled Metal Nanoparticles as Metasurfaces/Metamaterials, ICMAT2019, 2019.06.
2. Kaoru Tamada, Nano-Plasmonic Metamaterials Composed of Self-Assembled Metal Nanoparticles and Their Bio-Application, 2018 MRS Fall meeting, 2018.11.
3. Kaoru Tamada, LSPR-mediated high axial and temporal resolution fluorescence imaging on metal nanoparticle sheet, 11th International Symposium on Modern Optics and its Applications (ISMOA 2017, 2017.08.
4. Kaoru Tamada, Electromagnetically induced transparency of a plasmonic metamaterial light absorber based on multilayered metallic nanoparticle sheet, ICFPAM2016, 2016.11.
5. Kaoru Tamada, Dimensional Optical Property of Self-assembled Metallic Nanoparticles, Pacifichem2015, 2015.12.
6. Kaoru Tamada, Shihomi Masuda, Ayumi Ishijima, Eiji Usukura, Koichi Okamoto, Self-assembled Metallic Nanoparticles for Bioimaging, KJF-ICOMEP2015, 2015.09.
7. Kaoru Tamada, Eiji Usukura, Shihomi Masuda, Koichi Okamoto, Daisuke Tanaka, Yuhki Yanase, High Contrast and High Resolution Cell Imaging by use of Metallic Nanoparticle 2D sheet, ICMAT 2015 & IUMRS-ICA 2015, 2015.07.
8. Kaoru Tamada, Plasmonic Property of Multidimensional Self-assembled Metallic Nanoparticles, 第17回 微粒子と無機クラスターに関する国際シンポジウム(ISSPIC XVII), 2014.09.
9. Kaoru Tamada, Dimensional Optical Property of Self-assembled Metallic Nanoparticles, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
Membership in Academic Society
  • MRS of Singapore
  • American Chemical Society
  • The Chemical Society of Japan
  • The Japan Society of Vacuum and Surface Science
  • The Japan Society of Applied Physics
Awards
  •  Self-assembly of molecules and nanomaterials
Educational
Educational Activities
[Educational activities] She belongs to the Department of Chemistry, Graduate School of Science, and participates the education of undergraduate and graduate students in doctoral and master's programs. The class of "Nanomaterials and Interfaces I" for graduate students is an active learning class with a group-discussion, where students can learn surface science and nanoscience from basic to applications. She was also teaching a class for undergraduates "Daily Chemistry" for several years, that is also PBL-type active learning class. The percentage of female students going on to doctorate is quite high in her lab (5/8).
Social
Professional and Outreach Activities
[University activities] As a Vice-President of Kyushu University, she has been in charge of promotion of gender equality and student support. Especially, she is engaged in activities to promote the success of female and young researchers and strengthen their research capabilities. In FY 2019, she has launched the Diversity and Super Global Training Program (SENTAN-Q) in the "Diversity Research Environment Initiative (advanced)" under the MEXT's human resources development project for science and technology. She is also in charge of the dual hiring system for Scientist couples, the gender analysis for research achievement, the establishment of Kyushu University outstanding female researcher award (Sanae Ito prize) and also contributed to the 1st Jun Ashida award. She has been working hard to visualize the success of female researchers at Kyushu University. [Social Activities] Her social activities in Scientific society are mostly on JSAP, SSSJ and the Japan Society of Vacuum & Surface Science (JSVSS). She was the first female chair of the Molecular Electronics & Bioelectronics division in JSAP, and also the Editor-in-Chief of JSAP Journal. She launched the Kyushu division at SSSJ, and also built up Diversity division at JSVSS. She is a member of the Science Council of Japan, the Vision Development Committee, PEAKS in the Cabinet Office, and the PBL Education Promotion Task Force committee for Society 5.0.
[International activities] Long-term joint research with the National University of Singapore (NUS) has ranged from high-sensitive surface characterization with synchrotron system to synthesis and self-assembly of semiconductor nanoparticles. Other international collaborators are, for example, Australian National University, KAUST, and Heidelberg University in Germany. She has been organizing international conferences on a regular basis. She is a member of editorial Adviser Board, ACS Applied Nano Materials, ACS..