Surface-enhanced Raman Spectroscopy of the Coupling Molecules in Self-assemblies of Silver Nanoparticles

Abstract

Abstract: Ordered mono^-and double-layer structures of silver nanoparticles on smooth silver substrates were fabricated by self-assembly technique, where 1,4-benzenedithiol and p-aminothiophenol were used as the coupling molecules, respectively. The results of surface-enhanced Raman spectroscopic characterization shows that Raman scattering of the coupling molecules in the self-assemblies is greatly enhanced. The results demonstrate that the enhancement of 1,4-benzenedithiol results from the electromagnetic coupling of the smooth silver substrate with the mono-layer of silver nanoparticles, whereas the enhancement for p-aminothiophenol arises from the coupling interaction of two layers of silver nanoparticles. The enhancement effects in both cases are comparable to each other.

Key words: Silver nanoparticle, 1,4-Benzenedithiol, p-Aminothiophenol, Self-assembly, Surface-enhanced Raman spectroscopy

CLC Number:

O657.37

TrendMD:

ZHOU Yao-Guo, ZHENG Jun-Wei, LI Xiao-Wei, JI Yuan, GU Ren-Ao . Surface-enhanced Raman Spectroscopy of the Coupling Molecules in Self-assemblies of Silver Nanoparticles[J]. Chem. J. Chinese Universities, 2003, 24(12): 2177.

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Surface-enhanced Raman Spectroscopy of the Coupling Molecules in Self-assemblies of Silver Nanoparticles

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