| Au/Ag核-壳结构纳米粒子的制备及其SERS效应 |
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| 引用本文： | 纪小会,王连英,张昕彤,白玉白,李铁津,支壮志,孔祥贵,刘益春.Au/Ag核-壳结构纳米粒子的制备及其SERS效应[J].高等学校化学学报,2002,23(12):2357-2359. |
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| 作者姓名： | 纪小会 王连英 张昕彤 白玉白 李铁津 支壮志 孔祥贵 刘益春 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金 (批准号 :2 0 0 730 16 )，“九七三”项目 (批准号 :G19990 6 45 0 4)资助 |
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| 摘 要： | 随着大量有关表面增强拉曼散射 (SERS)的实验和理论研究的开展 ,金属纳米粒子作为一类重要的 SERS增强介质 ,已引起了人们浓厚的研究兴趣 1] .而 Au和 Ag作为最常用的活性基底物质 ,更是研究的热点 2 ,3 ] .最近 ,美国印第安那大学的 Nie等 4 ] 在单个银纳米粒子上 ,观察到高达 1 0 14 ～ 1 0 15的SERS因子 .同时 ,他们的另外一项工作表明银纳米粒子的形状和大小对 SERS活性有很大影响 5] .但是 ,由于 Ag溶胶制备的重复性较差 ,且粒度分布不均匀 ,通过控制银颗粒大小而调控 SERS活性是相当困难的6] .与 Ag相比 ,Au在可见光…
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| 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 |
| 文章编号： | 0251-0790(2002)12-2357-03 |
| 收稿时间： | 2001-09-17 |
Preparation of Au/Ag Core-shell Nanoparticles and Its Surface-enhanced Raman Scattering Effect |
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| JI Xiao-Hui ,WANG Lian-Ying ,ZHANG Xin-Tong ,BAI Yu-Bai ,LI Tie-Jin ,ZHI Zhuang-Zhi ,KONG Xiang-Gui ,LIU Yi-Chun.Preparation of Au/Ag Core-shell Nanoparticles and Its Surface-enhanced Raman Scattering Effect[J].Chemical Research In Chinese Universities,2002,23(12):2357-2359. |
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| Authors: | JI Xiao-Hui WANG Lian-Ying ZHANG Xin-Tong BAI Yu-Bai LI Tie-Jin ZHI Zhuang-Zhi KONG Xiang-Gui LIU Yi-Chun |
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| Institution: | 1. College of Chemistry, Jilin University, Changchun 130023, China;
2. Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130021, China |
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| 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. |
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| Keywords: | Gold nanoparticles Silver nanoparticles Au core-Ag shell nanoparticles SERS |
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