Surface Enhanced Raman Scattering on Mercaptopyridine-Capped CdS Microclusters

• NCJ Number: 255347
• Journal: Spectrochimica Acta A Volume: 66A Dated: 2007 Pages: 1199-1203
• Author(s): Y. Wang; Z. Sun; Y. Wang; H. Hu; B. Zhao; W. Xu; J. R. Lombardi
• Date Published: 2007
• Length: 5 pages
• Grant Number(s): 2006-DN-BX-K034
• Agencies: NIJ-Sponsored
• Award: Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents

Annotation

This article reports on a project that obtained the high-quality Raman spectra of 4-mercaptopyridine (4-Mpy) adsorbed on CdS microclusters. 

Abstract

The Raman signals were enhanced relative to the same molecules in solution. The authors compared the Raman spectra of 4-Mpy molecules adsorbed on CdS microclusters and Ag substrate. The difference of 4-Mpy molecules adsorbed on semiconductor and metal substrate was revealed. The results demonstrated that adsorbed species on semiconductor CdS can be detected by SERS spectroscopy. (publisher abstract modified)