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Molecular Crystals and Liquid Crystals Volume 516, 2010 - Issue 1: Proceedings of the Fourth Japanese-Italian Workshop on Liquid Crystals
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Original Articles

Photo-Induced Photonic Band Gap Shift of SiO2 Inverse Opal Films Infiltrated by Azo-Tolane Copolymer

Tomomi Shirota Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto-shi, Kumamoto, Japan
,
Masaki Moritsugu Innovative Collaboration Organization, Kumamoto University, Kumamoto-shi, Kumamoto, Japan
,
Shoichi Kubo Chemical Resource Laboratory, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan
,
Tomonari Ogata Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto-shi, Kumamoto, Japan
,
Takamasa Nonaka Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto-shi, Kumamoto, Japan
,
Osamu Sato Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-shi, Fukuoka, Japan
&
Seiji Kurihara Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto-shi, Kumamoto, JapanCorrespondence[email protected]
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Pages 174-181 | Published online: 22 Feb 2010
 
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Abstract

Photochemically tunable photonic band gap materials were prepared by the infiltration of liquid crystal polymers with azobenzene side chains and tolane side chains indicating larger birefringence into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from random to anisotropic molecular orientation of azobenzene and tolane side chains, then the azobenzene-tolane copolymer film showed larger birefringence. Thus, the reflection band of the SiO2 inverse opal films infiltrated with the azobenzene-tolane copolymers was shifted to longer wavelength region by the irradiation of linearly polarized light.

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