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Controlling the Spontaneous Precipitation of Silver Nanoparticles in Sol-Gel Materials

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Abstract

The mechanisms responsible for spontaneous silver precipitation in silver-doped sol-gel materials are identified. The chemistry of the solvent phase is found to be the critical factor in controlling this phenomenon. The addition of HCl as catalyst leads to the formation of AgCl and subsequent formation of silver upon light exposure. Another factor leading to silver precipitation is the reducing capability of methanol radicals. Silver precipitation is inhibited by simply washing out the pore solvents by a solvent exchange method.

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Author information

Authors and Affiliations

  1. Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA

    Pu-Wei Wu & Bruce Dunn

  2. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA

    Vinh Doan & Benjamin J. Schwartz

  3. Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA

    Eli Yablonovitch

  4. Department of Inorganic Materials, Tokyo Institute of Technology, Tokyo, 152-8552, Japan

    Masayuki Yamane

Authors
  1. Pu-Wei Wu
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  2. Bruce Dunn
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  3. Vinh Doan
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  4. Benjamin J. Schwartz
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  5. Eli Yablonovitch
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  6. Masayuki Yamane
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Wu, PW., Dunn, B., Doan, V. et al. Controlling the Spontaneous Precipitation of Silver Nanoparticles in Sol-Gel Materials. Journal of Sol-Gel Science and Technology 19, 249–252 (2000). https://doi.org/10.1023/A:1008748608055

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  • DOI: https://doi.org/10.1023/A:1008748608055

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