Increased enhancement in surface enhanced raman scattering from Ag electrodes with the addition of pyridine to the electrolyte
β Scribed by J.F. Owen; R.K. Chang
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 656 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
Low-frequency vibrational features are observed m the enhanced Raman spectra from an electrochemically roughened Ag electrode. Evidence is found that these features are related to resonant Raman scattermg from the internal vibrations of small Ag clusters stabilized on the surface. Comparison of the
## SERS from pyridine on an Ag clccrrode is almost complcrely quenched by underpotential deposition of Tl 10 a surface covemgc of J 3%. Removal of Tl by anodic stripping does not restore the original SERS intensity. These results susest that only a small fraction of adsorbed pyridine molecules is
The voltage dependence of the SER spectra of adsorbed ATP molecules has been found to vary with the pH values of the solutions. The differences in the spectra are explained by the protonation of the adsorbed ATP molecules.