高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (12): 2357.

• 研究简报 • 上一篇    下一篇

Au/Ag核-壳结构纳米粒子的制备及其SERS效应

纪小会1, 王连英1, 张昕彤1, 白玉白1, 李铁津1, 支壮志2, 孔祥贵2, 刘益春2   

  1. 1. 吉林大学化学学院, 长春130023;
    2. 中国科学院长春光学精密机械与物理研究所, 长春130021
  • 收稿日期:2001-09-17 出版日期:2002-12-24 发布日期:2002-12-24
  • 通讯作者: 白玉白(1941年出生),男,教授,博士生导师,从事凝聚态物质的光物理与光化学研究
  • 基金资助:

    国家自然科学基金(批准号:20073016);“九七三”项目(批准号:G1999064504)资助

Preparation of Au/Ag Core-shell Nanoparticles and Its Surface-enhanced Raman Scattering Effect

JI Xiao-Hui1, WANG Lian-Ying1, ZHANG Xin-Tong1, BAI Yu-Bai1, LI Tie-Jin1, ZHI Zhuang-Zhi2, KONG Xiang-Gui2, LIU Yi-Chun2   

  1. 1. College of Chemistry, Jilin University, Changchun 130023, China;
    2. Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130021, China
  • Received:2001-09-17 Online:2002-12-24 Published:2002-12-24

关键词: 金纳米粒子, 银纳米粒子, Au/Ag核-壳结构纳米粒子, 表面增强拉曼散射

Abstract: We prepared Au/Ag core-shell nanoparticles by growing Ag shell onto 12 nm Au core, using silver nitrate and sodium citrate as the reactants. By changing the molar ratio of Ag to Au, the shell thickness and thus the size of bimetallic particles could be controlled in convenient way. The formation of core-shell structure was proved by UV-Vis spectra, transmission electron microscopy(TEM), etc.. The core-shell particles showed a more narrow size distribution than Ag colloid prepared without Au core. The SERS activity of the core-shell particles was investigated by using 2,4-dimethylpyridine as the probe, which strongly indicated their potential application in SERS substrate materials.

Key words: Gold nanoparticles, Silver nanoparticles, Aucore-Agshell nanoparticles, SERS

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