Au/Ag核-壳结构纳米粒子的制备及其SERS效应  

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

作　　者：纪小会[1] 王连英[1] 张昕彤[1] 白玉白[1] 李铁津 支壮志[2] 孔祥贵[2] 刘益春[2] 

机构地区：[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

出　　处：《高等学校化学学报》2002年第12期2357-2359,共3页Chemical Journal of Chinese Universities

基　　金：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

摘　　要：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.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.

关 键 词：制备 SERS效应 金 银 核-壳结构纳米粒子 表面增强拉曼散射 

分 类 号：TB383[一般工业技术—材料科学与工程]