Enhancement of Raman Scattering of 1,4-Benzenedithiol by CdS Nanoparticles Assembled on a Silver Surface  

作　　者：ZHOUQun ZHAOHong LIXiao-wei ZHENGJun-wei 

机构地区：[1]DepartmentofChemistry,SuzhouUniversity,Suzhou215006,P.R.China

出　　处：《Chemical Research in Chinese Universities》2004年第2期138-141,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.2 0 0 730 2 8) and the Key L aboratory of ModernOptical Technologies in Suzhou U niversity

摘　　要：CdS nanoparticles were assembled on the smooth surface of a piece of silver by using 1,4-benzenedithiol as coupling molecules. The SEM and resonance Raman spectroscopic characterizations demonstrate that the nanosized structure of CdS was still preserved upon assembly, and a two-dimensional structure of CdS nanoparticles was formed on the substrate surface. The FT-Raman spectra indicate that 1,4-benzenedithiol was coupled between CdS nanoparticles and the silver surface with a tilted orientation. The Raman scattering of 1,4-benzenedithiol was substantially enhanced by the assembled CdS nanoparticles, probably due to the alteration of the polarizability of 1,4-benzenedithiol and the electromagnetic interaction between the dipoles of the CdS particle with its image in the metal substrate.CdS nanoparticles were assembled on the smooth surface of a piece of silver by using 1,4-benzenedithiol as coupling molecules. The SEM and resonance Raman spectroscopic characterizations demonstrate that the nanosized structure of CdS was still preserved upon assembly, and a two-dimensional structure of CdS nanoparticles was formed on the substrate surface. The FT-Raman spectra indicate that 1,4-benzenedithiol was coupled between CdS nanoparticles and the silver surface with a tilted orientation. The Raman scattering of 1,4-benzenedithiol was substantially enhanced by the assembled CdS nanoparticles, probably due to the alteration of the polarizability of 1,4-benzenedithiol and the electromagnetic interaction between the dipoles of the CdS particle with its image in the metal substrate.

关 键 词：Cadmium sulfide 1 4-Benzenedithiol Nanoparticle Self-assembly Raman spectroscopy 

分 类 号：TN304.2[电子电信—物理电子学]