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Sol-Gel Preparation of Coating Films Containing Noble Metal Colloids

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Abstract

Coating films containing Au, Ag, Pt and Pd metal colloids have been prepared by sol-gel processing. It is shown that for oxide films the temperature where the metal particles are precipitated by heating in air depends on metal species: 200°C for Au, 600°C for Ag, 800°C for Pt and 1000°C for Pd. The use of reducing atmosphere lowers the temperature for formation of noble metal colloids. This procedure can be used for direct formation of metal colloids from metal ions in the film as well as reduction of oxide particles to metal particles in the film. For an organic-inorganic matrix, noble metal colloids are precipitated by thermal reduction or photo-reduction. Thermal reduction occurs as a result of reduction by decomposing organic matter. Photo-reduction occurs as a result of UV irradiation.

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Authors and Affiliations

  1. Fukui Universitu of Technology, Gakuen, Fukui, 910, Japan

    Sumio Sakka

  2. Institute for Chemical Research, Kyoto University, Uji, Kyoto-Fu, 611, Japan

    Hiromitsu Kozuka

Authors
  1. Sumio Sakka
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  2. Hiromitsu Kozuka
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Sakka, S., Kozuka, H. Sol-Gel Preparation of Coating Films Containing Noble Metal Colloids. Journal of Sol-Gel Science and Technology 13, 701–705 (1998). https://doi.org/10.1023/A:1008645006266

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  • DOI: https://doi.org/10.1023/A:1008645006266

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