Ito, Kohzo - The University of Tokyo - Department Of Advanced Materials Science

个人简介

1981:Graduated, Faculty of Engineering, The University of Tokyo 1986:Doctor of Engineering from The University of Tokyo 1986:Researcher at the Research Institute of Polymers and Textiles, Agency of Industrial Science and Technology (AIST), Ministry of International Trade and Industry (MITI) 1991:Lecturer, The University of Tokyo 1994:Associate Professor, The University of Tokyo 2003:Professor, The University of Tokyo 2005:Director of Advanced Softmaterials Inc.(concurrent post) Educational Activities Graduate school:Soft Matter Physics Undergraduate school: An Introduction to Dynamics in Nonequilibrium System

研究领域

We have been investigating soft materials such as polymers, liquid crystals, biomolecules, and so on. In particular, we now focus on supramolecular systems of polyrotaxanes with topological architecture as follows: 1) Slide-ring materials All the gels have been classified into only two groups: physical and chemical gels. We have recently invented a novel kind of gel, slide-ring gel with freely movable junctions, by chemically cross-linking cyclic molecules in different polyrotaxanes. The slide-ring gel shows mechanical properties and nanoscopic structures quite different from conventional chemical and physical gels. You can also incorporate the concept of freely movable junctions into polymeric materials without solvent such as films, textiles, paints, and so on. Consequently, the slide-ring materials are supposed to innovate in polymer science and technology. 2) Molecular electronics using conducting polymers It is important for fabricating the molecular devices highly designed from a single molecular level to acquire the information on a single molecular wire. For this purpose, we have established the method to measure the conductivity of a single molecular wire by fabricating the narrow-gap electrodes. In this study, we aim to investigate the conductivity of a few kinds of a single nanowire such as an insulated molecular wire made from conducting polymers and insulating cyclic molecules.

近期论文

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S. Uenuma, R. Maeda, H. Yokoyama, K. Ito, "Precise control of cyclodextrin-based pseudo-polyrotaxane lamellar structure via axis polymer composition", Soft Matter, 16, 9035(2020). 　 Kazuaki Kato, Yuta Ikeda, Kohzo Ito, "Direct Determination of Cross-Link Density and Its Correlation with the Elastic Modulus of a Gel with Slidable Cross-Links", ACS Macro Letters, 8, 700-704(2019). 　 Koichi Mayumi, Chang Liu, Kohzo Ito, "Mechanical and Fracture Properties of Dynamically Cross-Linked Polymer Gels and Elastomers with Molecular Necklaces", NIHON REOROJI GAKKAISHI, 47(2), 43-49(2019). 　 R Tantiwechwuttikul, M Yarime, Kohzo Ito, "Solar Photovoltaic Market Adoption: Dilemma of Technological Exploitation vs Technological Exploration", Technologies and Eco-innovation towards Sustainability II, 215-227(2019). Shuntaro Uenuma, Rina Maeda, Hideaki Yokoyama and Kohzo Ito, "Formation of well-defined supramolecular microstructures consisting of γ-cyclodextrin and polyether —rods, cubes, plates, and nanosheets—guided by guest polymer structure", Polymer, 179, 121689(2019). 　 Shuntaro Uenuma, Rina Maeda, Hideaki Yokoyama and Kohzo Ito, "Formation of Isolated Pseudo-Polyrotaxane Nanosheet Consisting of α-Cyclodextrin and Poly(ethylene glycol)", Macromolecules, 52(10), 3881-3887(2019). 　 Shuntaro Uenuma, Rina Maeda, Hideaki Yokoyama and Kohzo Ito, "Autonomously isolated pseudo-polyrotaxane nanosheets fabricated via hierarchically ordered supramolecular self-assembly", Chemical Communications, 55(29), 4158-4161(2019), pulished as Outside Back Cover Artwork. 　 Guan Li, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, and Kohzo Ito, "Efficient Mechanical Toughening of Polylactic Acid without Substantial Decreases in Stiffness and Transparency by the Reactive Grafting of Polyrotaxanes", Journal of Inclusion Phenomena and Macrocyclic Chemistry, 93(1-2), 107-116(2019). 　 Yusuke Yasuda, Yuta Hidaka, Koichi Mayumi, Takeshi Yamada, Kazushi Fujimoto, Susumu Okazaki, Hideaki Yokoyama, and Kohzo Ito, "Molecular Dynamics of Polyrotaxane in Solution Investigated by Quasi-Elastic Neutron Scattering and Molecular Dynamics Simulation: Sliding Motion of Rings on Polymer", Journal of the American Chemical Society, 141(24), 9655-9663(2019), published as Supplementary Cover Artwork. 　 Si Yu Zheng, Chang Liu, Lan Jiang, Ji Lin, Jin Qian, Koichi Mayumi, Zi Liang Wu, Kohzo Ito, Qiang Zheng, "Slide-Ring Cross-Links Mediated Tough Metallosupramolecular Hydrogels with Superior Self-Recoverability", Macromolecules, 52(17), 6748-6755(2019). 　 Chang Liu, Hirokazu Kadono, Hideaki Yokoyama, Koichi Mayumi, and Kohzo Ito, "Crack propagation resistance of slide-ring gels", Polymer, 181(24), 121782(2019). 　 Chang Liu, Koichi Mayumi*, Kyohei Hayashi, Lan Jiang, Hideaki Yokoyama, Kohzo Ito, "Direct Observation of Large Deformation and Fracture Behavior at the Crack Tip of Slide-Ring Gel", Jounal of the Electrochemical Society, 166(9), B3143-B3147(2019). 　 Yusuke Yasuda, Masatoshi Toda, Koichi Mayumi*, Hideaki Yokoyama, Hiroshi Morita, Kohzo Ito, "Sliding Dynamics of Ring on Polymer in Rotaxane: a Coarse-Grained Molecular Dynamics Simulation Study", Macromolecules, 52(10), 3787-3793(2019). 　 Shuntaro Uenuma, Rina Maeda, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, and Kohzo Ito, "Drastic Change of Mechanical Properties of Polyrotaxane Bulk: ABA–BAB Sequence Change Depending on Ring Position", ACS Macro Letters, 8(2), 140-144(2019), published as Supplementary Cover Artwork. 　 Ying-Cheng Lin, Kohzo Ito, and Hideaki Yokoyama, "Solid polymer electrolyte based on crosslinked polyrotaxane", Polymer, 136, 121-127(2018). 　 Hiroaki Gotoh, Chang Liu, Abu Bin Imran, Mitsuo Hara, Takahiro Seki, Koichi Mayumi, Kohzo Ito, and Yukikazu Takeoka, "Optically transparent, high-toughness elastomer using a polyrotaxane cross-linker as a molecular pulley", Science advances, 4(10), eaat7629(2018). 　 Lan Jiang, Chang Liu, Koichi Mayumi, Kazuaki Kato, Hideaki Yokoyama, and Kohzo Ito, "Highly Stretchable and Instantly Recoverable Slide-Ring Gels Consisting of Enzymatically Synthesized Polyrotaxane with Low Host Coverage", Chemistry of Materials, 30(15), 5013-5019(2018). 　 Taku Goto, Masaki Iida, Helen Tan, Chang Liu, Koichi Mayumi, Rina Maeda, Koichi Kitahara, Kazuto Hatakeyama, Tsuyohito Ito, Yoshiki Shimizu, Hideaki Yokoyama, Kaoru Kimura, Kohzo Ito, Yukiya Hakuta, Kazuo Terashima, "Thermally conductive tough flexible elastomers as composite of slide-ring materials and surface modified boron nitride particles via plasma in solution", Applied Physics Letter, 112, 101901(2018). 　 Akira Tanaka, Kazuaki, Kato, Kohzo Ito, Kenji Urayama, "Pronounced Effects of the Densities of Threaded Rings on the Strain-Dependent Poisson’s Ratio of Polyrotaxane Gels with Movable Cross-links", Soft Matter., 14(15), 2808-2815(2018). 　 Kazuaki Kato, Ayaka Hori, and Kohzo Ito, "An efficient synthesis of low-covered polyrotaxanes grafted with poly(ε-caprolactone) and the mechanical properties of its cross-linked elastomers", Polymer, 147(4), 67-73(2018).