Raman and surface-enhanced Raman scattering of violuric acid and violurate ion adsorbed on a silver electrode
β Scribed by L. F. C. de Oliveira; P. S. Santos; J. C. Rubim
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 505 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0377-0486
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π SIMILAR VOLUMES
Enhanced Raman scattering has been observed from the hexacyanoferrate (II) and (III) ions adsorbed on Ag electrode surfaces. In the former case, five vibrational modes in the low-frequency range (214, 373,423,494 and 560 cm-') and four in the nitrilc-stretching region (2026,2067,2082 and 2122 cm-')
SERS from crystal rlolct (CV) on a Ag clectrodc was mvcslqakd under prcrrsonsncc and resonance condltlons. The ckcll~llon prolilc of the chcmaorbcd spccics is Me that of chsrolvcd mokculcs but mtcnsltirs ZUIL' =I000 tnncs luger. The Raman enhancement IS = IO8 and ckhlblts 3 spcc~lic potcntlal dcpcnd
The short-range component of SERS IS tnvcstigated usu-~g a new probe molecule, lhlourca Through a study of the chxactcnstics or thiourea ndsarbcd on a sliver clectrodc we conclude that remnant surFace complexes arc not a un~vcrul rcquircment for large enhancement. We lurther show that the npphul vol