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Yuma Morimitsu Last modified date:2024.04.18

Assistant Professor / Department of Applied Chemistry
Department of Applied Chemistry
Faculty of Engineering

 Reseacher Profiling Tool Kyushu University Pure
Academic Degree
Doctor of Eng.
Country of degree conferring institution (Overseas)
Field of Specialization
Polymer Science
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Research Interests
  • Elucidation of polymer chain dynamics at solid interfaces
    keyword : polymer, interface, direct observation, dynamics
Academic Activities
1. YUMA MORIMITSU, HISAO MATSUNO, YUKARI ODA, SATORU YAMAMOTO, AND KEIJI TANAKA, Direct visualization of cooperative adsorption of a string-like molecule onto a solid, Science Advances, DOI: 10.1126/sciadv.abn6349, 8, 41, abn6349, 2022.10.
2. Yukari Oda, Daisuke Kawaguchi, Yuma Morimitsu, Satoru Yamamoto, Keiji Tanaka, Direct observation of morphological transition for an adsorbed single polymer chain, Scientific Reports, 10.1038/s41598-020-77761-0, 10, 1, 2020.12, Abstract

A better understanding of the structure of polymers at solid interfaces is crucial for designing various polymer nano-composite materials from structural materials to nanomaterials for use in industry. To this end, the first step is to obtain information on how synthetic polymer chains adsorb onto a solid surface. We closely followed the trajectory of a single polymer chain on the surface as a function of temperature using atomic force microscopy. Combining the results with a full-atomistic molecular dynamics simulation revealed that the chain became more rigid on the way to reaching a pseudo-equilibrium state, accompanied by a change in its local conformation from mainly loops to trains. This information will be useful for regulating the physical properties of polymers at the interface.

3. Yuma Morimitsu, Hisao Matsuno, Noboru Ohta, Hiroshi Sekiguchi, Atsushi Takahara, Keiji Tanaka, Mechanical Stabilization of Deoxyribonucleic Acid Solid Films Based on Hydrated Ionic Liquid, Biomacromolecules, 10.1021/acs.biomac.9b01207, 21, 2, 464-471, 2020.02.
4. Yuma Morimitsu, Daniel Salatto, Naisheng Jiang, Mani Sen, Shotaro Nishitsuji, Benjamin M. Yavitt, Maya K. Endoh, Ashwanth Subramanian, Chang-Yong Nam, Ruipeng Li, Masafumi Fukuto, Yugang Zhang, Lutz Wiegart, Andrei Fluerasu, Keiji Tanaka, Tadanori Koga, “Structurally Neutral” Densely Packed Homopolymer-Adsorbed Chains for Directed Self-Assembly of Block Copolymer Thin Films, Macromolecules, 10.1021/acs.macromol.9b00597, 52, 14, 5157-5167, 2019.07.
5. Yuma Morimitsu, Hisao Matsuno, Noboru Ohta, Hiroshi Sekiguchi, Keiji Tanaka, Direct Correlation between Molecular Cross-linking and Macroscopic Mechanical Properties for Green Solids of Deoxyribonucleic Acids, ChemNanoMat, 10.1002/cnma.201600222, 2, 11, 1023-1027, 2016.11.
1. Yuma Morimitsu, Keiji Tanaka, Chain Dynamics at Interfaces Visualized by Real Space Observation, Chemistry Seminar 2023 Fall @ HangYong Univ., 2023.11.
2. Yuma Morimitsu, Hisao Matsuno, Yukari Oda, Satoru Yamamoto, Keiji Tanaka, Cooperative Adsorption of Polymer Chains on Solids, The 9th International Discussion Meeting on Relaxations in Complex Systems, 2023.08.
3. Yuma Morimitsu, Hisao Matsuno, Yukari Oda, Satoru Yamamoto, Keiji Tanaka, Cooperative Adsorption of Polymer Chains on Solid Surfaces, APS march meeting 2023, 2023.03.
4. Yuma Morimitsu, Satoru Yamamoto, Keiji Tanaka, Direct Observation of Thermal Molecular Motion of Polystyrene Single Chains Adsorbed on a Solid Surface, 5th G'L'owing Polymer Symposium in KANTO, 2022.12.