Preparation of Polysilane/Silica Nano-particle Hybrid Thin Films and Their Optical Properties

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  • ポリシラン－シリカナノ粒子ハイブリッド薄膜の作製と光学特性
  • ポリシラン シリカ ナノ リュウシ ハイブリッド ハクマク ノ サクセイ ト コウガク トクセイ

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Abstract

Photofunctional polymethylphenylsilane (PMPS) and toluene dispersed silica nano-particles (13 nm average diameter) were used for the preparation of organic-inorganic hybrid thin films. The surface of silica nano-particles were modified with phenyl and methyl groups. The thin films were prepared by spin-coating the toluene solution of PMPS and silica nano-particles on quartz and silicon substrates, respectively. The UV spectra of polysilane/phenyl modified silica nano-particle hybrid thin films indicated a red-shift of absorption peak related to the Si-Si bond in PMPS. This interesting phenomenon was caused by the longer σ-conjugation due to the stretched Si-Si bond, which was resulted from the π-π interaction of phenyl groups between PMPS and surface of silica nano-particles. Furthermore, after UV irradiation and heat treatment of the hybrid thin films containing small amount of PMPS, the cross-linked nano porous silica thin films with a low refractive index were obtained.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 65 (6), 440-444, 2008

    The Society of Polymer Science, Japan

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