Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 779, Issue -, Pages 126-130Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2016.04.008
Keywords
Surface-enhanced Raman spectroscopy; Ultramicroelectrode; Roughing procedure
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Funding
- National Basic Research Program of China [2012CB932902]
- National Natural Science Foundation of China [91323303, 21327002, 51205333, 21321062]
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Ultramicroelectrode (UME) has a rapid response time to obtain electrochemical transient information. To obtain the real-time transient Raman information, we introduce the Au UMEs into the measurements of electrochemical surface-enhanced Raman spectroscopy (EC-SERS). However, the SEM and electrochemical results show that the roughened Au UMEs by conventional procedure for macroelectrodes will produce a microcavity because the enhanced mass transfer makes Au dissolved irreversibly. Thus, a roughening program based on pulse potential voltammetry is proposed to improve SERS activity of Au UMEs. We find a porous nanostructured film can be formed on the surface of Au UMEs, which exhibits good stability and stronger intensity in the EC-SERS experiments. (C) 2016 Elsevier B.V. All rights reserved.
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