Enhanced photochemical-shift of reflection band from an inverse opal film based on larger birefringent polymer liquid crystals: Effect of tolane group on the photochemical shift behavior

Masaki Moritsugu, Tomomi Shirota, Shoichi Kubo, Tomonari Ogata, Osamu Sato, Seiji Kurihara

    研究成果: Article査読

    11 被引用数 (Scopus)

    抄録

    Photo-chemically tunable photonic band gap materials are prepared by infiltration of liquid crystal polymers having azobenzene groups into voids of SiO2 inverse opal films. Linearly polarized (LP) light irradiation results in transformation from a random to an anisotropic molecular orientation of azobenzene side chains in the voids of the SiO2 inverse opal film, leading to the reversible and stable shift of the reflection peak to longer wavelength more than 15 nm. To improve switching properties, we use copolymers of azobenzene monomer and tolane monomer, which have higher birefringence, as infiltration materials into the voids. The azobenzenetolane copolymers are found to show higher birefringence than azobenzene homopolymers by the LP light irradiation at higher temperature. Consequently, the reflection band of the SiO2 inverse opal film infiltrated with the azobenzene-tolane copolymer can be shifted to longer wavelength region more than 55 nm by the irradiation of LP light.

    本文言語English
    ページ(範囲)1981-1990
    ページ数10
    ジャーナルJournal of Polymer Science, Part B: Polymer Physics
    47
    20
    DOI
    出版ステータスPublished - 2009 10 15

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 物理化学および理論化学
    • ポリマーおよびプラスチック
    • 材料化学

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