Potential-induced Raman behavior of individual (R)-di-2-naphthylprolinol molecules on a Ag-modified Ag electrode
Article first published online: 4 NOV 2010
Copyright © 2010 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 42, Issue 5, pages 951–957, May 2011
How to Cite
Luo, Z., Yang, W., Luo, Y., Peng, A., Ma, Y., Fu, H., Yao, J. and Loo, B. H. (2011), Potential-induced Raman behavior of individual (R)-di-2-naphthylprolinol molecules on a Ag-modified Ag electrode. J. Raman Spectrosc., 42: 951–957. doi: 10.1002/jrs.2819
- Issue published online: 20 MAY 2011
- Article first published online: 4 NOV 2010
- Manuscript Accepted: 9 SEP 2010
- Manuscript Received: 22 APR 2010
- National Natural Science Foundation of China. Grant Numbers: 20733006, 50720145202
- National Research Fund for Fundamental Key Project 973. Grant Number: 2006CB806200
- Ag electrode;
The applicability of surface-enhanced Raman spectroscopy is demonstrated to probe the adsorption behavior of individual molecules on a Ag electrode. High-quality SERS spectra of (R)-di-2-naphthylprolinol (DNP) were obtained from ultradilute solutions (10−12 M) on the Ag-nanoparticle-modified Ag electrode, which is attributed to the high electromagnetic (EM) effect of the SERS-active system as well as to the strong adsorption and interaction of DNP molecules with Ag. The stable SERS spectra present remarkable potential dependence, which gives evidence for the behavior of individual DNP molecules on the Ag surface. Based on statistical analysis for the probability of DNP molecules located in ‘hot spots’, we propose an SERS mechanism for individual molecules in the electrode system, in combination with the hot-spot model and orientation of the probe molecules. Copyright © 2010 John Wiley & Sons, Ltd.