| Hirotsugu Kikuchi | Last modified date：2024.04.02 |
Professor /
nano-organization
Department of Integrated Materials
Institute for Materials Chemistry and Engineering
Department of Integrated Materials
Institute for Materials Chemistry and Engineering
Graduate School
Undergraduate School
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Homepage
https://kyushu-u.elsevierpure.com/en/persons/hirotsugu-kikuchi
Reseacher Profiling Tool Kyushu University Pure
http://kikuchi-lab.cm.kyushu-u.ac.jp
Kikuchi Lab. .
Academic Degree
Dr of Eng
Country of degree conferring institution (Overseas)
No
Field of Specialization
Chemistry and Physics of Soft Matter, Polymer and Liquid Crystal
Total Priod of education and research career in the foreign country
01years01months
Outline Activities
Professor Kikuchi is a pioneer of polymer-stabilized liquid crystal blue phase, which has a large temperature range of blue phase and sub-millisecond electro-optical response and therefore is emerging as the next-generation display material. He is the recipient of the Award for Encouragement of Research in Polymer Science from the Japanese Society of Polymer Science in 1995, the Outstanding Paper Award in the Polymer Journal in 1995, the Outstanding Paper Award of the Japanese Liquid Crystal Society in 2003, and the Special Recognition Awards from the Society for Information Display in 2009. In 2011, he received the Award of the Society of Polymer Science, Japan and in 2014, he received the Award of the Japanese Liquid Crystal Society for Outstanding Achievement for his leading contributions to the research of the polymer-stabilized liquid crystal blue phase. In recent years, we have discovered the nematic phase, which has a dielectric constant exceeding 10000 and exhibits ferroelectricity(Adv. Mater. 2017). Furthermore, we discovered ferroelectric smectic A phase (Adv Sci. 2022).
Research
Research Interests
Awards
- Development and Application of Ferroelectric Nematic Phase
keyword : liquid crystal, ferroelectlic nematic phase
2015.04～2025.06.
Papers
| 1. | Hirotsugu Kikuchi, Hiroyuki Matsukizono, Koki Iwamatsu, Sota Endo, Shizuka Anan, Yasushi Okumura, Fluid Layered Ferroelectrics with Global C-infinity v Symmetry, ADVANCED SCIENCE, 10.1002/advs.202202048, 9, 26, 2022.09, Ferroelectricity in fluid materials, which allows free rotation of molecules, is an unusual phenomenon raising cutting-edge questions in science. Conventional ferroelectric liquid crystals have been found in phases with low symmetry that permit the presence of spontaneous polarization. Recently, the discovery of ferroelectricity with high symmetry in the nematic phase has attracted considerable attention. However, the physical mechanism and molecular origin of ferroelectricity are poorly understood and a large domain of macroscopically oriented spontaneous polarization is difficult to fabricate in the ferroelectric nematic phase. This study reports new fluid layered ferroelectrics with the C∞v symmetry in which nearly complete orientation of the spontaneous polarization remains stable under zero electric field without any orientation treatment. These ferroelectrics were obtained by simplifying the molecular structure of a compound with a known ferroelectric nematic phase, although the simplification reduced the dipole moment. The results provide useful insights into the mechanism of ferroelectricity due to dipole–dipole interactions in molecular assemblies. The new ferroelectric materials are promising for a wide range of applications as soft ferroelectrics..  |
- Control of Phase Behavior and Application to Fast Electro-optics of Polymer/Liquid Crystal Composites
- For his leading contributions to the research and development of optically isotropic liquid crystal materials for the Blue Phase mode that exhibits fast electro-optical response and requires no surface treatment for device fabrication
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