UV-Light-Induced Swelling and Visible-Light-Induced Shrinking of a TiO2-Containing Redox Gel

Authors

  • T. Tatsuma,

    1. Institute of Industrial Science, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
    2. PRESTO, Japan Science and Technology Agency, Honcho, Kawaguchi-shi, Saitama 332-0012 (Japan)
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  • K. Takada,

    1. Institute of Industrial Science, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
    2. Present address: Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
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  • T. Miyazaki

    1. Institute of Industrial Science, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
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  • This work was supported in part by a Grant-in-Aid for Scientific Research on Priority Areas (Area No. 417, Research No. 14050028 for T.T.) from the Ministry of Education, Culture, Sports, Science and Technology of Japan and a Grant-in-Aid for Scientific Research (No. 17350064 for T.T.) from the Japan Society for the Promotion of Science (JSPS).

Abstract

original image

A poly(acrylate) gel containing Ag+and TiO2nanoparticles is swollen by UV light and shrunk by visible light in water (see figure and cover). The swollen gel keeps its size and shape in the dark. Localized irradiation with UV and visible light causes localized swelling and shrinking, respectively.

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