Adsorption Behavior of Rhodamine 6G on Silver Surfaces Studied by Electrochemical Surface-Enhanced Raman Spectroscopy

Authors

Chan-juan CHEN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Cheng ZONG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Guo-kun LIU, State Key Laboratory of Marine Environmental Science, College of the Enviroment and Ecology, Xiamen University, Xiamen 361002, Fujian, China;
Bin REN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Bin REN(bren@xmu.edu.cn)

Abstract

Rhodamine 6G (R6G) is one of the most common probe molecules employed in single molecule surface-enhanced Raman spectroscopy (SM-SERS). The study in adsorption behavior of R6G will help understand the interactions between R6G and surface. In this paper, we used electrochemical surface-enhanced Raman spectroscopy (SERS) to study the potential-dependent adsorption behavior of R6G on silver electrodes. Our results show that when the potential moved negatively, the orientation of R6G on silver surface changed from vertical to inclined adsorption. This result indicates that the abnormal SM-SERS spectra of R6G observed in the former SM-SERS studies from other research groups are due to the reorientation of the R6G molecule on the surface rather than the change in resonance effect of R6G. Such a detailed study will assist the understanding for the spectral change of SERS in SM-SERS studies.

Graphical Abstract

Keywords

rhodamine 6G, adsorption behavior, electrochemistry, electrochemical surface-enhanced Raman spectroscopy

DOI Link

https://doi.org/10.13208/j.electrochem.150819

Publication Date

2016-02-29

Online Available Date

2015-11-09

Revised Date

2015-09-28

Received Date

2015-08-19

Recommended Citation

Chan-juan CHEN, Cheng ZONG, Guo-kun LIU, Bin REN. Adsorption Behavior of Rhodamine 6G on Silver Surfaces Studied by Electrochemical Surface-Enhanced Raman Spectroscopy[J]. Journal of Electrochemistry, 2016 , 22(1): 32-36.
DOI: 10.13208/j.electrochem.150819
Available at: https://jelectrochem.xmu.edu.cn/journal/vol22/iss1/3