影像科学与光化学 ›› 2003, Vol. 21 ›› Issue (3): 169-175.DOI: 10.7517/j.issn.1674-0475.2003.03.169

• 研究论文 • 上一篇    下一篇

银离子在二氧化硅粒子表面上的成核反应

蒋仲杰, 刘春艳, 刘云   

  1. 中国科学院, 理化技术研究所, 北京, 100101
  • 收稿日期:2002-11-22 修回日期:2003-01-08 出版日期:2003-05-23 发布日期:2003-05-23
  • 通讯作者: 刘春艳,E-mail:cyliu@ipc.ac.cn,传真:010-64879375
  • 基金资助:
    国家自然科学基金资助项目(20173070)

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

摘要: 在含有乙醇的SiO2溶胶中,Ag+不管在碱性、中性或在弱碱、弱酸情况下都能在SiO2粒子表面上还原成核,形成金属Ag颗粒.研究表明,银的等离子体共振吸收峰的移动是尺寸效应和表面效应共同作用的结果.

关键词: SiO2溶胶, Ag纳米粒子, 等离子体共振吸收

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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