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金属纳米粒子自组装多层结构的光谱特征
引用本文:范强,周群,李艳,郑军伟.金属纳米粒子自组装多层结构的光谱特征[J].光谱实验室,2006,23(5):933-935.
作者姓名:范强  周群  李艳  郑军伟
作者单位:苏州大学化学化工学院,215123
摘    要:分别以对巯基苯胺和1,4-二巯基苯为偶联分子,采用自组装方法,在功能化玻片上组装了二层和三层银纳米粒子有序结构.实验发现,耦联于一、二层组装体中的对巯基苯胺的拉曼散射可由粒子间电磁偶合和电荷转移而显著增强.但第二层组装银纳米粒子上1,4-二巯基苯的吸附可导致组装体中对巯基苯胺的拉曼散射强度显著减弱,这与分子吸附导致的粒子中电荷分布的改变密切相关.纳米粒子的进一步组装使得1,4-二巯基苯的拉曼光谱有所增强.

关 键 词:表面增强拉曼光谱  吸收光谱  电荷转移  对巯基苯胺  1  4-二巯基苯
文章编号:1004-8138(2006)05-0933-03
收稿时间:2006-05-25
修稿时间:2006-06-08

Spectroscopic Characteristics of Self-Assembled Multilayer of Silver Nanoparticles
FAN Qiang,ZHOU Qun,LI Yan,ZHENG Jun-Wei.Spectroscopic Characteristics of Self-Assembled Multilayer of Silver Nanoparticles[J].Chinese Journal of Spectroscopy Laboratory,2006,23(5):933-935.
Authors:FAN Qiang  ZHOU Qun  LI Yan  ZHENG Jun-Wei
Institution:Department of Chemistry, Suzhou University,Suzhou,,Jiangsu 215123 ,P. R. China
Abstract:Two-and three-dimensional structures of silver nanoparticles were prepared on the glass slides by using self-assembly technique.4-Aminothiophenol and 1,4-dihiobenzene was used as the coupling reagents.The Raman scattering of the 4-aminothiophenol molecules interconnected between the layers of the silver nanoparticles can be greatly enhanced via electromagnetic coupling between the particles and the charge transfer process.The adsorption of 1,4-dithiobenzene resulted in a decrease of the Raman signals due to the charge redistribution in the particles.A further assembled layer of the silver nanoparticles led to a slight increase of the Raman signal of the 1,4-dithiobenzene molecules.
Keywords:Surface-Enhanced Raman Spectroscopy  Absorption Spectroscopy  Charge Transfer  4-Aminothiophenol  1  4-Dithiobenzene  
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