Ex situ vs. in situ electrode roughening procedures for surface-enhanced Raman spectroscopy
1989; Elsevier BV; Volume: 258; Issue: 2 Linguagem: Inglês
10.1016/0022-0728(89)85117-4
ISSN2590-2954
AutoresKenneth D. Beer, Weslene Tanner, Robin L. Garrell,
Tópico(s)Electrochemical Analysis and Applications
ResumoSurface-enhanced Raman spectroscopy has been used to probe pyridine, 4-ethylpyridine, and 4-cyanopyridine on silver and gold electrode surfaces. The difference between roughening the electrode in the absence (ex situ) or presence (in situ) of the analyte has been explored. Roughening in situ gives rise to new spectral features attributed to trapping of the analyte in the surface and to complexation of the analyte with metal atoms or ions. It is shown that the ex situ roughening procedure is to be preferred when the orientation or adsorption isotherm of the analyte is of interest.
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