Imaging Science and Photochemistry ›› 2003, Vol. 21 ›› Issue (3): 169-175.DOI: 10.7517/j.issn.1674-0475.2003.03.169

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THE REDUCTION REACTION OF SILVER IONS ON THE SURFACE OF SILICA

JIANG Zhong-jie, LIU Chun-yan, LIU Yun   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P.R.China
  • Received:2002-11-22 Revised:2003-01-08 Online:2003-05-23 Published:2003-05-23

Abstract: In weak acidic,neutral,weak basic or basic water-alcohol solution,silver nanoparticles are generated on silica colloidal particles by the reduction of Ag+ ions.The plasmon band of silver particles supported on the surface of silica considerably shifted to longer wavelength compared with the pure silver sol.The shift in absorption spectra of the silver plasmon band is explained in terms of surface effects and size effects.

Key words: silica colloid, silver nanoparticle, plasmon band

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