Charge-Transfer Induced Surface-Enhanced Raman Scattering in Silver Nanoparticle Assemblies
Charge-Transfer Induced Surface-Enhanced Raman Scattering in Silver Nanoparticle Assemblies
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DOI：
10.1021/jp067045s
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发表时间：
2007-01
影响因子：
3.7
通讯作者：
Qun Zhou;Gui Zhao;Yanwen Chao;Yan Li;and Ying Wu;Junwei Zheng
中科院分区：
文献类型：
--
作者：
Qun Zhou;Gui Zhao;Yanwen Chao;Yan Li;and Ying Wu;Junwei Zheng
利用银纳米粒子和功能分子的自组装技术，制备了金属/分子/金属的分子结。银纳米颗粒之间的相互连接分子的拉曼散射可以大大增强。特别是对于银/4-氨基噻吩/银（Ag/PATP/Ag）组装，相对于a1模式，b2模式的增强更大，归因于银纳米粒子之间的电荷转移穿过相互连接的PATP分子。银纳米粒子的分子偶极动量和表面性质对相互连接分子的拉曼散射增强有很大影响。
Molecular junctions of metal/molecule/metal were fabricated with silver nanoparticles and functional molecules through layer-by-layer self-assembly techniques. The Raman scattering of the interconnecting molecules between the silver nanoparticles can be greatly enhanced. For the silver/4-aminothiophenol/silver (Ag/PATP/Ag) assembly, in particular, the larger enhancement of the b2 modes, relative to that of the a1 modes, is ascribed to the charge transfer between the silver nanoparticles tunneling through the interconnecting PATP molecules. The molecular dipolar momentum and surface property of the silver nanoparticles have large effects on the enhancement of the Raman scattering of the interconnecting molecules.