Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 688, Issue -, Pages 384-391Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2012.09.008
Keywords
Serotonin; Silver; Self-assembled monolayers; Surface enhanced Raman scattering; In situ electrochemical SERS
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Funding
- National Natural Science Foundation of China [21073121]
- Key Laboratory of Resource Chemistry of Ministry of China
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Surface enhanced Raman scattering (SERS) technique was used to observe the adsorption structure of serotonin (5-hydroxytryptamine, 5-HT) monolayers formed on silver electrode surface at pH 11 and also by the aid of density functional theory (OFT). The SERS spectrum implied that monolayers of 5-HT could be self-assembled on the silver surface through O-10 and N-6 atoms and the molecular plane should be tilted on the surface. In situ electrochemical SERS experiment was performed in 0.1 mol L-1 KCl solution to investigate the stability of the 5-HT monolayers on the silver electrode surface. It could be found that 5-HT monolayers on silver surface experienced the changes of adsorption fashions as the potential shifting to a more negative direction prior to complete detachment from the silver surface. (C) 2012 Elsevier B.V. All rights reserved.
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