Effects of Mn doping on surface enhanced Raman scattering properties of TiO2 nanoparticles

• NCJ Number: 304193
• Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Volume: 95 Dated: 2012 Pages: 213-217
• Author(s): Xiangxin Xue; Wei Ji; Zhu Mao; Zhishi Li; Bing Zhao; John R. Lombardi
• Date Published: 2012
• Length: 5 pages
• Grant Number(s): 2006-DN-BX-K034
• Agencies: NIJ-Sponsored
• Publication Type: Research (Applied/Empirical)
• Award: Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents

Annotation

In the current project, TiO2 and Mn-doped TiO2 (1 percent, 3 percent, and 5 percent) nanoparticles (NPs) were synthesized by a sol-hydrothermal method for surface-enhanced Raman spectroscopy study.

 

Abstract

When using the 4-mercaptobenzoic acid (4-MBA) as the probing molecule, optimum SERS signals were observed on the Mn–TiO2 (3 percent) samples. On the 3 percent Mn doped TiO2 substrate, 4-MBA molecules exhibited a higher SERS intensity by a factor of six compared with the native enhancement of 4-MBA adsorbed on pure TiO2 NPs. The possible mechanism for the phenomena is also discussed. This study opens a new dimension for the family of SERS substrates. (publisher abstract modified)