K
Keiki Kishikawa
Researcher at Chiba University
Publications - 236
Citations - 4025
Keiki Kishikawa is an academic researcher from Chiba University. The author has contributed to research in topics: Liquid crystal & Hydrogen bond. The author has an hindex of 31, co-authored 226 publications receiving 3627 citations. Previous affiliations of Keiki Kishikawa include Tokushima Bunri University & Massachusetts Institute of Technology.
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Journal ArticleDOI
Design amphiphilic dipolar π-systems for stimuli-responsive luminescent materials using metastable states
Shiki Yagai,Satoru Okamura,Yujiro Nakano,Mitsuaki Yamauchi,Keiki Kishikawa,Takashi Karatsu,Akihide Kitamura,Akira Ueno,Daiki Kuzuhara,Hiroko Yamada,Tomohiro Seki,Hajime Ito +11 more
TL;DR: A strategy for mechano-responsive Luminescent materials by imparting amphiphilic and dipolar characteristics to a luminescent π-conjugated system is demonstrated.
Journal ArticleDOI
Hierarchical organization of photoresponsive hydrogen-bonded rosettes.
Shiki Yagai,Toshiharu Nakajima,Keiki Kishikawa,Shigeo Kohmoto,Takashi Karatsu,Akihide Kitamura +5 more
TL;DR: Hydrogen-bonded disk-shaped aggregates (rosettes) composed of azobenzene-appended melamine and barbiturate or cyanurate are investigated in view of their hierarchical organization and photoresponsive behavior, and dynamic light scattering and UV-irradiation experiments revealed that the dissociation and the reformation of columnar aggregates can be controlled by the trans-cis isomerization of the azOBenzene moiety.
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Biomimetic non-iridescent structural color materials from polydopamine black particles that mimic melanin granules
TL;DR: In this paper, a novel approach for creating non-iridescent bright structural color materials from polydopamine (PDA) black particles is presented, where two biomimetic features, melanin granules and the amorphous structures found in nature, were incorporated into these materials, consisting of PDA black particles to develop a bright and non iridescent structural color without using any additives.
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A ferroelectrically switchable columnar liquid crystal phase with achiral molecules: superstructures and properties of liquid crystalline ureas.
TL;DR: In this article, columnar liquid crystalline compounds N,N‘-bis(3,4,5-trialkoxylphenyl)ureas 1a−c (R = n-C8H17, n -C12H25, and n-c16H33) were synthesized, and their phase transitions were measured by differential scanning calorimetery.
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Full-Color Biomimetic Photonic Materials with Iridescent and Non-Iridescent Structural Colors
TL;DR: A facile method for the preparation of biomimetic core-shell particles with melanin-like polydopamine (PDA) shell layers that enabled the production of both iridescent and non-iridescent structural colors from only one component.