Charge-Transfer Induced Surface-Enhanced Raman Scattering in Silver Nanoparticle Assemblies
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- 作者：Qun Zhou ; Gui Zhao ; Yanwen Chao ; Yan Li ; Ying Wu ; Junwei Zheng
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：February 8, 2007
- 年：2007
- 卷：111
- 期：5
- 页码：1951 - 1954
- 全文大小：159K
- 年卷期：v.111,no.5(February 8, 2007)
- ISSN：1932-7455
文摘
Molecular junctions of metal/molecule/metal were fabricated with silver nanoparticles and functional moleculesthrough layer-by-layer self-assembly techniques. The Raman scattering of the interconnecting moleculesbetween 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, isascribed to the charge transfer between the silver nanoparticles tunneling through the interconnecting PATPmolecules. The molecular dipolar momentum and surface property of the silver nanoparticles have largeeffects on the enhancement of the Raman scattering of the interconnecting molecules.