| 1. |
Masa-aki Morikawa, Miko Mizuno, Naoyuki Harada, Nobuo Kimizuka, On-demand Triplet-sensitized Photoswitching of Arylazopyrazoles, Chemistry Letters, 52, 9, 727-731, 2023.07, Triplet-sensitized Z-to-E photoisomerization of arylazopyrazole derivatives was achieved with red-light excitation of Pd(II) meso-tetraphenyltetrabenzoporphyrin (PdTPTBP) in deaerated DMSO solution. The triplet energy gap between the sensitizer and the arylazopyrazoles affects the apparent rate of Z-to-E photoisomerization. On-demand photoswitching of arylazopyrazoles proceeds facilely and reversibly with almost 100% efficiency despite the endothermic triplet energy transfer processes.. |
| 2. |
Masa-aki Morikawa, Yuta Yamanaka, Joseph K.-H. Hui, Nobuo Kimizuka, Photoliquefaction and phase transition of m-bisazobenzenes give molecular solar thermal fuels with a high energy density, RSC Advances, 13, 34, 24031-24037, 2023.08, A series of m-bisazobenzene chromophores modified with various alkoxy substituents (1; methoxy, 2; ethoxy, 3; butoxy, 4; neopentyloxy) were developed for solvent-free molecular solar thermal fuels (STFs). Compounds (E,E)-1-3 in the crystalline thin film state exhibited photoliquefaction, the first example of photo-liquefiable m-bisazobenzenes. Meanwhile, (E,E)-4 did not show photoliquefaction due to the pronounced rigidity of the interdigitated molecular packing indicated by X-ray crystallography. The m-bisazobenzenes 1-4 exhibited twice the Z-to-E isomerization enthalpy compared to monoazobenzene derivatives, and the latent heat associated with the liquid-solid phase change further enhanced their heat storage capacity. To observe both exothermic Z-to-E isomerization and crystallization in a single heat-up process, the temperature increase of differential scanning calorimetry (DSC) must occur at a rate that does not deviate from thermodynamic equilibrium. Bisazobenzene 1 showed an unprecedented gravimetric heat storage capacity of 392 J g−1 that exceeds previous records for well-defined molecular STFs.. |
| 3. |
Pankaj Bharmoria, Shima Ghasemi, Fredrik Edhborg, Raúl Losantos, Zhihang Wang, Anders Mårtensson, Masa-Aki Morikawa, Nobuo Kimizuka, Ümit İşci, Fabienne Dumoulin, Bo Albinsson, Kasper Moth-Poulsen, Far-red triplet sensitized Z-to-E photoswitching of azobenzene in bioplastics, Chem. Sci., 13, 11904-11911, 2022.08, We report the first example of direct far-red triplet sensitized molecular photoswitching in a condensed phase wherein a liquid azobenzene derivative (Azo1) co-assembled within a liquid surfactant–protein film undergoes triplet sensitized Z-to-E photoswitching upon far-red/red light excitation in air. The role of triplet sensitization in photoswitching has been confirmed by quenching of sensitizer phosphorescence by Z-Azo1 and temperature-dependent photoswitching experiments. Herein, we demonstrate new biosustainable fabrication designs to address key challenges in solid-state photoswitching, effectively mitigating chromophore aggregation and requirement of high energy excitations by dispersing the photoswitch in the trapped liquid inside the solid framework and by shifting the action spectrum from blue-green light (450–560 nm) to the far-red/red light (740/640 nm) region.. |
| 4. |
Masa-aki Morikawa, Yuta Yamanaka, Nobuo Kimizuka, Liquid Bisazobenzenes as Molecular Solar Thermal Fuel with Enhanced Energy Density, Chem. Lett., 51, 4, 402-406, 2022.01. |
| 5. |
Yuki Nagai, Masa-aki Morikawa, Nobuo Kimizuka, Near-infrared Vapochromism in Lipid-packaged Mixed-valence Coordination Polymers, Chem. Commun., 58, 2112-2115, 2022.01, Reversible vapochromism in the NIR region is achieved for a mixed-valence platinum complex with lipid counterions, from which exclusion of crystallization water by organic vapor alters the lipid molecular orientation, which amplifies the information to changes in the 1D coordination structure and the electronic state.. |
| 6. |
Zhihang Wang, Henry Moïse, Martina Cacciarini, Mogens Brøndsted Nielsen, Masa-aki Morikawa, Nobuo Kimizuka, and Kasper Moth-Poulsen, Liquid-Based Multijunction Molecular Solar Thermal Energy Collection Device, Adv. Sci., 10.1002/advs.202103060, 2021.10. |
| 7. |
Yimin Liang, Joseph Ka-Ho Hui, Masa-aki Morikawa, Hirotaka Inoue, Teppei Yamada, and Nobuo Kimizuka, High Positive Seebeck Coefficient of Aqueous I−/I3− Thermocells Based on Host−Guest Interactions and LCST Behavior of PEGylated α‑Cyclodextrin, ACS Appl. Energy Mater., 10.1021/acsaem.1c00844, 2021.05. |
| 8. |
Nagai Yuki、Ishiba Keita、Yamamoto Ryosuke、Yamada Teppei、Morikawa Masa‐aki、Kimizuka Nobuo, Light‐Triggered, Non‐Centrosymmetric Self‐Assembly of Aqueous Arylazopyrazoles at the
Air-Water Interface and Switching of Second‐Harmonic Generation, Angew. Chem. Int. Ed., 10.1002/anie.202013650, 60, 6333-6338, 2021.02, Trans-p-methoxy arylazopyrazole spontaneously forms non-centrosymmetric polar crystals, which reversibly undergo liquefaction upon photoisomerization to the cis-isomer. This liquid cis-isomer has a large electric dipole moment and is highly soluble in water (solubility up to approximate to 58 mM), which is remarkably higher than that of the trans-isomer (690 uM). Vis-light illumination of the aqueous cis-isomer generates macroscopically oriented, non-centrosymmetric crystals at the air-water interface. Polar crystals are also formed in sandwich glass cells (spacing, 20um) upon photo-induced crystallization of the liquid cis-isomer. The trans-crystals thus formed showed second harmonic generation (SHG) whose intensity is switched on/off in response to the photo-induced phase transition.. |
| 9. |
Bharmoria Pankaj、Hisamitsu Shota、Sasaki Yoichi、Kang Tejwant Singh、Morikawa Masa-aki、Joarder Biplab、Moth-Poulsen Kasper、Bildirir Hakan、M?rtensson Anders、Yanai Nobuhiro、Kimizuka Nobuo
, Photon upconverting bioplastics with high efficiency and in-air durability, Journal of Materials Chemistry C, 10.1039/D1TC00287B, 2021.05. |
| 10. |
Masa-aki Morikawa, Hanyu Yang, Keita Ishiba, Kouta Masutani, Joseph K.-H. Hui, Nobuo Kimizuka , A Liquid Arylazopyrazole Derivative as Molecular Solar Thermal Fuel with Long-term Thermal Stability, Chem. Lett., org/10.1246/cl.200171, 2020.05, A liquid arylazopyrazole derivative is newly synthesized as molecular solar thermal fuel. It shows efficient trans-to-cis photoisomerization in the neat liquid state, with the cis-isomer having a significantly longer thermal half-life (t1/2 = 3,069 h, at 25°C). It overcomes the limited thermal stability of the corresponding liquid cis-azobenzene derivative (t1/2 = 16 h) and marked a gravimetric energy density of 41 kJ·mol-1, which meets the requirement for thermophysical heat storage applications.. |
| 11. |
Ryosuke Yamamoto, Yusuke Minami, Joseph K.-H. Hui, Masa-aki Morikawa, Nobuo Kimizuka
, Enhanced Electric Polarization and Polar Switching of Dipolar Aromatic Liquids Confined in Supramolecular Gel Networks, J. Am. Chem. Soc., 142, 3, 1424-1432, 2020.01. |
| 12. |
Deepak Asthana, Shota Hisamitsu, Masa-aki Morikawa, Pengfei Duan, Takuya Nakashima, Tsuyoshi Kawai, Nobuhiro Yanai, Nobuo Kimizuka, Aqueous Photon Upconversion by Anionic Acceptors Self-Assembled on Cationic Bilayer Membranes with a Long Triplet Lifetime, Organic Materials, 1, 43-49, 2019.09. |
| 13. |
Zhihang Wang, Raul Losantos, Diego Sampedro, Masa-aki Morikawa, Karl Boerjesson, Nobuo Kimizuka, Kasper Moth-Poulsen, Demonstration of an azobenzene derivative based solar thermal energy storage system, Journal of Materials Chemistry A: Materials for Energy and Sustainability, 7(25), 15042-15047, 2019.06, Molecules capable of reversible storage of solar energy have recently attracted increasing interest, and are often referred to as molecular solar thermal energy storage (MOST) systems. Azobenzene derivatives have great potential as an active MOST candidate. However, an operating lab scale experiment including solar energy capture/storage and release has still not been demonstrated. In the present work, a liquid azobenzene derivative is tested comprehensively for this purpose. The system features several attractive properties, such as a long energy storage half-life (40 h) at room temperature, as well as an excellent robustness demonstrated by optically charging and discharging the molecule over 203 cycles without any sign of degradation (total operation time of 23 h). Successful measurements of solar energy storage under simulated sunlight in a microfluidic chip device have been achieved. The identification of two heterogeneous catalyst systems during testing enabled the construction of a fixed bed flow reactor demonstrating catalyzed back-conversion from cis to trans azobenzene at room temperature under flow conditions. The working mechanism of the more suitable catalytic candidate was rationalized by detailed density functional theory (DFT) calculations. Thus, this work provides detailed insights into the azobenzene based MOST candidate and identifies where the system has to be improved for future solar energy storage applications.. |
| 14. |
Kang, Tejwant Singh, Masa-aki Morikawa, Nobuo Kimizuka, Liquid crystalline microspheres of azobenzene amphiphiles formed by thermally induced pH changes in binary water-hydrolytic ionic liquid media, Chemical Communications, 55(38), 5459-5462, 2019.04, Anionic azobenzene-containing bilayered membranes dispersed in binary water–ionic liquid (IL) media undergo proton-responsive transformation into liquid crystalline microspheres (LCMs). This transformation was induced by protons released by the heat induced hydrolysis of tetrafluoroborate ions in the ILs. This work demonstrates the first beneficial use of hydrolysis-susceptible ILs in chemistry.. |
| 15. |
Yufeng Yang, Masatoshi Ishida, Yuhsuke Yasutake, Susumu Fukatsu, Chihoko Fukakusa, Masa-Aki Morikawa, Teppei Yamada, Nobuo Kimizuka, Hiroyuki Furuta, Hierarchical Hybrid Metal-Organic Frameworks
Tuning the Visible/Near-Infrared Optical Properties by a Combination of Porphyrin and Its Isomer Units, Inorganic Chemistry, 10.1021/acs.inorgchem.9b00251, 58, 7, 4647-4656, 2019.04, Hybrid metal-organic frameworks (MOFs) with core/shell-like hierarchical structure comprised of zirconium metal and porphyrin (e.g., TPP) and its isomer, N-confused porphyrin (NCP), were synthesized through a seed-mediated reaction. The hierarchical structures of hybrid MOFs were characterized by the microscopic image analyses (e.g., scanning electron microscope (SEM), energy dispersive X-ray (EDX) spectrometry, and confocal laser scanning microscope (CLSM)). Taking advantage of the intrinsic light-harvesting properties of the porphyrin dye and the N-confused isomer, changing the core/shell layer structures of hybrid MOFs allows for tuning of the visible-to-near-infrared (NIR) absorption/emission characters, excited-state energy migrations, and photosensitization capabilities. The Förster energy transfer event occurring in the bulk MOF samples by photoexcitation enabled us to control the photoinduced singlet oxygen generation through the comprehensive light-harvesting ability of these hybrid porphyrinic MOFs. Therefore, implementation of a precisely designed porphyrin "substitute" into the MOF-based materials indeed provides a new mimic of the photosynthetic pigment system and should be potentially applicable for solar-light-driven devices.. |
| 16. |
Pankaj Bharmoria, Shota Hisamitsu, Hisanori Nagatomi, Taku Ogawa, Masa-Aki Morikawa, Nobuhiro Yanai, Nobuo Kimizuka, Simple and Versatile Platform for Air-Tolerant Photon Upconverting Hydrogels by Biopolymer-Surfactant-Chromophore Co-assembly, Journal of the American Chemical Society, 10.1021/jacs.8b05821, 140, 34, 10848-10855, 2018.08, Exploration of triplet-triplet annihilation based photon upconversion (TTA-UC) in aqueous environments faces difficulty such as chromophores insolubility and deactivation of excited triplets by dissolved oxygen molecules. We propose a new strategy of biopolymer-surfactant-chromophore coassembly to overcome these issues. Air-stable TTA-UC with a high upconversion efficiency of 13.5% was achieved in hydrogel coassembled from gelatin, Triton X-100 and upconverting chromophores (triplet sensitizer and emitter). This is comparable to the highest UC efficiency observed to date for air-saturated aqueous UC systems. Moreover, this is the first example of air-stable TTA-UC in the form of hydrogels, widening the applicability of TTA-UC in biological applications. The keys are two-fold. First, gelatin and the surfactant self-assemble in water to give a developed hierarchical structure with hydrophobic domains which accommodate chromophores up to high concentrations. Second, thick hydrogen-bonding networks of gelatin backbone prevent O2 inflow to the hydrophobic interior, as evidenced by long acceptor triplet lifetime of 4.9 ms. Air-stable TTA-UC was also achieved for gelatin with other nonionic surfactants (Tween 80 and Pluronic f127) and Triton X-100 with other gelling biopolymers (sodium alginate and agarose), demonstrating the versatility of current strategy.. |
| 17. |
Shimono Tomoya, Matsuki Masaya, Yamada Teppei, Morikawa Masaaki, Yasuda Nobuhiro, Fujigaya Tsuyohiko, Kimizuka Nobuo , Selective ionic conduction in choline iodide/triiodide solid electrolyte and its application to thermocells, Chemistry Letters, 47, 261-264, 47, 261-264, 2018.01. |
| 18. |
Keita Ishiba, Takao Noguchi, Hiroaki Iguchi, Masa-aki Morikawa, Kenji Kaneko, Nobuo Kimizuka, Photoresponsive Nanosheets of Polyoxometalates Formed by Controlled Self-Assembly Pathways, Angew. Chem. Int. Ed., 56, 2974-2978, 2017.02, 本研究は，ポリオキソメタレート（POM）とエーテルアンモニウムが水中において自己集合することにより，巨大ナノシート結晶を形成することを見出した。また，光還元されたPOMが水中へ溶解することを利用し，ナノシートの光エッチングを達成した．さらに，ナノシート上へ位置選択的に銀ナノ粒子を析出させる新しい加工技術を開発した．. |
| 19. |
Keita Ishiba, Daisuke Kichise, Hiroaki Iguchi, Masa-aki Morikawa, Nobuo Kimizuka, Self-assembly of Oligo(ethylene oxide)-linked Diammonium Ions with Polyoxometalates into Ordered Polyhedron Nanocrystals in Aqueous Media, Chem. Lett., 46, 430-433, 2017.01. |
| 20. |
Nobuo Kimizuka, Nobuhiro Yanai, Masa-aki Morikawa, Photon Upconversion and Molecular Solar Energy Storage by Maximizing the Potential of Molecular Self-Assembly, Langmuir, 32, 12304-12322, 2016.10. |
| 21. |
Jing Liu, Masa-aki Morikawa, Hairui Lei, Keita Ishiba, Nobuo Kimizuka, Hierarchical Self-Assembly of Luminescent Tartrate-Bridged Chiral Binuclear Tb(III) Complexes in Ethanol, Langmuir, 32, 10597-10603, 2016.09. |
| 22. |
JOSEPH KA HO HUI, Hiroyuki Kishida, Keita Ishiba, Kenta Takemasu, Masa-aki Morikawa, Nobuo Kimizuka, Ferroelectric Coordination Polymers Self-assembled from Mesogenic Zinc(II) Porphyrin and Dipolar Bridging Ligands, Chem. Eur. J., 22, 14213-14218, 2016.08, 本研究は，脂溶性亜鉛ポルフィリンと永久双極子を有する二官能性軸配位子からなる配位高分子錯体を開発した．この錯体は軸配位子による一次元鎖構造の形成とその結合軸の電場誘起回転による双極子モーメントのフリップ－フロップ運動に基づき，強誘電性を発現することを明らかにした．. |
| 23. |
Shigesaburo Ogawa, Masa-aki Morikawa, Gergely Juhász, Nobuo Kimizuka, Interlocked dimerization of C3-Symmetrical Boron Difluoride Complex: Designing Non-Cooperative Supramolecular Materials for Luminescent Thin Films, RSC Adv., 5, 60373-60379, 2015.07, 本研究は，脂溶性のβ-diketonate boron difluoride (BF2dk) 錯体を合成し，その溶液中における自己集合と発光特性，ならびにキャスト薄膜の発光挙動について調査したものである．3 回対称性のBF2dk 錯体は，溶液中において濃度の増加とともにダイマーを形成し，その発光色は青色から黄色へ変化した．また，この溶液を固体基板上へキャストすることにより均一な薄膜が得られ，ダイマー溶液と同様の発光スペクトルを与えた．このことから，BF2dk 錯体の均質な発光性薄膜を作製するためには，3 回対称性骨格を導入することが重要であることが示された．. |
| 24. |
Keita Ishiba, Masa-aki Morikawa, Chie Chikara, Teppei Yamada, Katsunori Iwase, Mika Kawakita, Nobuo Kimizuka, Photoliquefiable Ionic Crystals: A Phase Crossover Approach for Photon Energy Storage Materials with Functional Multiplicity, Angew. Chem. Int. Ed., 54, 1532-1536, 2014.12, 本研究は，新しいイオン性アゾベンゼン誘導体を合成し，光照射によるアゾベンゼン部位の trans-cis 異性化に伴って，結晶－イオン液体相転移を制御した初めての例である．また，UV光照射により準安定状態となった cis 型イオン液体が熱刺激によって trans 型結晶に戻る際に，異性化熱と液体－結晶相転移熱を同時に放出するため，従来に比べて２倍の熱エネルギーを貯蔵できることが明らかとなった．また，この相転移に伴って，イオン伝導度も桁違いに変化することから，新しいフェーズクロスオーバー材料として期待される．. |
| 25. |
Kouta Masutani, Masa-aki Morikawa, Nobuo Kimizuka, A Liquid Azobenzene Derivative as a Solvent-Free Solar Thermal Fuel, Chem. Commun., 50, 15803-15806, 2014.10, 本研究は，新しい液体アゾベンゼン誘導体を合成し，光エネルギーを分子の歪エネルギーとして貯蔵できる Solar Thermal Fuel を開発した．この液体アゾベンゼン誘導体は，ニート状態においても希薄溶液中と同様に速やかな trans-cis 光異性化反応を可逆的に引き起こすことが分かった．また，準安定な cis 状態から最安定な trans 状態へ戻る際に，50 kJ/mol の発熱が観測され，繰り返し利用可能なSolar Thermal Fuel として応用できるものと期待される．. |
| 26. |
Tejwant Singh Kang, Keita Ishiba, Masa-aki Morikawa, Nobuo Kimizuka, Self-Assembly of Azobenzene Bilayer Membranes in Binary Ionic Liquid–Water Nanostructured Media, Langmuir, 30, 2376-2384, 2014.02, 本研究は，アゾベンゼン部位を有する両親媒性化合物を合成し，イオン液体と水の混合溶媒中における自己集合特性について検討した．混合溶媒中ではイオン液体のクラスター化に基づいて，単独溶媒では見られない特異な自己集合挙動を示すことを見出した．. |
| 27. |
Masa-aki Morikawa, Shohei Tsunofuri, Nobuo Kimizuka, Controlled Self-assembly and Luminescence Characteristics of Eu(III) Complexes in Binary Aqueous/Organic Media, Langmuir, 29, 12930-12935, 2013.09, 本研究は，発光性 Eu(III) 錯体の対カチオンとして脂質分子を用いると，水中で自発的にナノ粒子が形成されることを見出した．また，ナノ粒子の形成により錯体の発光が著しく増大し，超分子化学的に Eu(III)錯体の発光を制御する新しい方法論を開拓した．. |
| 28. |
Masa-aki Morikawa, Risa Nii, Nobuo Kimizuka, Redox-Active Microcapsules of Cytochrome c Formed at the Ionic Liquid-Water Interface, Chem. Lett., 42, 788-790, 2013.05, 本研究は，イオン液体と水の界面を利用したシトクロム c マイクロカプセルの作製とその高次構造，酸化還元特性について分光学的手法により明らかにした成果である．. |
| 29. |
Morikawa Masa-aki, Murata Ken, Yamada Kazuo, Kimizuka Nobuo, Controlled Formation of Microspheres from Ferrocene- Derivatized Amino Acids in Binary Aqueous-Organic Media, Chem. Lett., 2013.04, 本研究は，フェロセン部位を有するアミノ酸を新規に合成し，水／THF混合溶媒中において自発的にマイクロ粒子が形成されることを見出した．また，そのサイズを自在に制御できることや電気化学特性について調査した成果である．. |
| 30. |
Morikawa Masa-aki, Takano Aki, Tao Shuich, Kimizuka Nobuo, Biopolymer-Encapsulated Protein Microcapsules Spontaneously Formed at the Ionic Liquid-Water Interface, Biomacromolecules, 13, 4075-4080, 2012.11, 本研究は，疎水性イオン液体に導入したミクロ水滴を鋳型として，ワンポットでタンパク質マイクロカプセルを作製するための方法論を開拓した．本手法により，核酸や酵素を定量的にタンパク質カプセルに内包できることから，治療や診断を目指した医療材料として，応用展開できるものと期待される．. |
| 31. |
Morikawa Masa-aki, Kimizuka Nobuo, Converting Molecular Information of Redox Coenzymes via Self-Assembly, Chem. Commun., 2012.09, 本研究は，補酵素（ニコチンアミドアデニンジヌクレオチド；NAD, NADH）とシアニン色素が特異的に自己組織化することによって，NADやNADHに内在する分子情報（酸化還元状態や分子構造）を吸収，蛍光，円偏光二色性スペクトルならびにナノ集積構造として情報変換・増幅できることを示した成果である．. |
| 32. |
Tejwant Singh, Pankaj Bharmoria, Morikawa Masa-aki, Kimizuka Nobuo, Arvind Kumar, Ionic Liquids Induced Structural Changes of Bovine Serum Albumin in Aqueous Media: A Detailed Physicochemical and Spectroscopic Study, J. Phys. Chem. B, 116, 11924-11935, 2012.09. |
| 33. |
J. Liu, M-a. Morikawa, and N. Kimizuka, Conversion of Molecular Information by Luminescent Nanointerface Self-Assembled from Amphiphilic Tb(III) Complexes, J. Am. Chem. Soc., 133, 17370-17374, 2011.09, 本研究は，新規に分子設計・合成した両親媒性 Tb(III) 錯体が水中において自発的にベシクル形成することを見出した．また，アデノシン 5’-三リン酸（ATP）をはじめとする高エネルギーリン酸基を有する分子との相互作用において，正の協同性（アロステリズム）を示すことを明らかにした．これは分子の自己組織化に基づいた高度な分子情報の変換ならびに増幅系を構築するうえで，大変重要な研究成果である．. |
| 34. |
M-a. Morikawa, K. Kim, H. Kinoshita, K. Yasui, Y. Kasai, N. Kimizuka, Aqueous Nanospheres Self-Assembled from Hyperbranched Polymers and Silver Ions: Molecular Inclusion and Photoreduction Characteristics, Macromolecules, 43, 2, 8971-8976, 2010.10, 本研究は，ハイパーブランチポリマーと銀イオンから成る自己組織性ナノ粒子の形成と機能性分子の内包，さらに銀イオンの光還元特性について明らかにしたものである．従来，高分子をビルディングブロックとして自己組織性ナノ材料を開発する場合，構造の明確なブロックポリマーやデンドリマーなどが利用されてきた．しかし，これらの高分子は，多段階の反応により合成されるため，実用上の問題がある．本研究では，ワンポット合成されたハイパーブランチポリマーを用いて，自己組織性ナノ粒子が形成されることをはじめて明らかにするとともに，ナノ粒子の内部にポルフィリン等の機能性分子が内包されることを見出した．. |
| 35. |
T. Soejima, M-a. Morikawa and N. Kimizuka, Holey Gold Nanowires formed by Photoconversion of Dissipative Nanostructures Emerged at the Aqueous-Organic Interface, Small, 5, 2043-2047 , 2009.05. |
| 36. |
T. Soejima, T. Hasegawa, M-a. Morikawa and N. Kimizuka,
, Photo-induced Outgrowth of Gold Nanotadpoles in Aqueous Bilayer Dispersions, Chem. Lett., 38, 688-689 , 2009.05. |
| 37. |
Tomohiro Shiraki, Masa-aki Morikawa, and Nobuo Kimizuka, Morphological Transformation of Ultrathin Gold Nanosheets to Rounded Nanotapes in the Photomediated Reduction Process, Chem. Lett., 37, 352, 2008.02. |
| 38. |
Tomohiro Shiraki, Masa-aki Morikawa, and Nobuo Kimizuka, Amplification of Molecular Information through Self-Assembly:Nanofibers Formed from Amino Acids and Cyanine Dyes by Extended Molecular Pairing, Angew.Chem.Int.Ed, 47, 106, 2008.01. |
| 39. |
Masa-aki Morikawa, Masakuni Yoshihara, Takeshi Endo and Nobuo Kimizuka, a-Helical Polypeptide Microcapsules Formed by Emulsion-Templated Self-Assembly, Chem. Eur. J., 10.1002/chem.200400751, 11, 5, 1574-1578, Vol. 11, 1574-1578, 2005.01. |
| 40. |
Masa-aki Morikawa, Masakuni Yoshihara, Takeshi Endo and Nobuo Kimizuka, ATP as Building Blocks for the Self-Assembly of Excitonic Nanowires, J. Am. Chem. Soc., 10.1021/ja043844h, 127, 5, 1358-1359, Vol. 127, 1358-1359, 2005.01. |
| 41. |
Masa-aki Morikawa and Nobuo Kimizuka, Spatially Controlled Self-Assembly of Gold Nanoparticles Encased in
a-Helical Polypeptide Nanospheres, Chem. Commun., 10.1039/b507818k, 38, 4866-4868, 4866-4868, 2005.01. |
| 42. |
Takanori Kubo, Masaaki Morikawa, Hideki Ohba and Masayuki Fujii, Synthesis of DNA-Peptide Conjugates by Solid-Phase Fragment Condensation, Org. Lett., Vol. 5, No. 15, 2623-2626., 2003.01. |
| 43. |
Masazo Niwa, Masa-aki Morikawa, Kenji Yagi, and Nobuyuki Higashi, Interaction between Polylysine Monolayer and DNA at the Air-Water Interface, Int. J. Biol. Macromol., Vol. 30, Issue 1, 47-54., 2002.01. |
| 44. |
Masazo Niwa, Masa-aki Morikawa, Tomohiro Nabeta, and Nobuyuki Higashi, Preparation of Anthryl Group-Tagged Helical Poly(g-benzyl L-glutamate) Self-Assembled Film on Gold Surface and Its Interaction with DNA, Macromolecules, Vol. 35, No. 7, 2769-2775., 2002.01. |
| 45. |
Masa-aki Morikawa, Nobuo Kimizuka, Masakuni Yoshihara and Takeshi Endo, New Colorimetric Detection of Glucose by Means of Electron-Accepting Indicators: Ligand Substitution of [Fe(acac)3-n(phen)n]n+ Complexes Triggered by Electron Transfer from Glucose Oxidase, Chem. Eur. J., 10.1002/1521-3765(20021216)8:243.0.CO;2-V, 8, 24, 5580-5584, Vol. 8, No. 24, 5580-5584., 2002.01. |
| 46. |
Masazo Niwa, Masa-aki Morikawa, and Nobuyuki Higashi, Controllable Orientation of Helical Poly(L-glutamic acid) Rods through Macrodipole Interaction on Gold Surfaces and Vectorial Electron Transfer, Angew. Chem. Int. Ed., Vol. 39, No. 5, 960-963., 2000.01. |
| 47. |
Masazo Niwa, Masa-aki Morikawa, and Nobuyuki Higashi, Enhancement of Helicity of Oligopeptides by Incorporating with Helical Polypeptide Self-Assemblies, Sci. Eng. Rev. Doshisha Univ., Vol. 41, No. 3, 185-192., 2000.01. |
| 48. |
Masazo Niwa, Masa-aki Morikawa, and Nobuyuki Higashi, Discrimination between N- and C-Termini of Polypeptides by a Two-Dimensional Array of Helical Poly(L-glutamic acid) Rods on Gold Surfaces, Langmuir, Vol. 15, 5088-5092., 1999.01. |
| 49. |
Masa-aki Morikawa, Nobuyuki Higashi, and Masazo Niwa, Control of Adsorption State of PLGA Monolayers on Gold and Helix Macrodipole Interaction, Proceedings of 2nd International Symposium on Polyelectrolytes, 427-430., 1999.01. |
