Surface-enhanced Raman scattering from chloride on copper electrodes

✍ Scribed by G. Niaura; A. Malinauskas

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 632 KB
• Volume: 207
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89029-h

✦ Synopsis

A new method for the preparation of SERS active Cu electrode surfaces with high enhancement factors, which enable the observation of high quality spectra in the low-frequency region at different chloride concentrations, is proposed. Low-frequency modes at 160 and 145 cm-t are attributed to Cu-Cu vibrations by isotopic ("CU/~~CU) frequency shift. Qualitative agreement with predictions of the dipole-dipole coupling model are observed for Cu-Cl mode frequency dependence on Cl-ion concentration. A linear frequency u(Cu-Cl) dependence on relative integrated SERS intensity for deactivated Cu electrodes has been found. Differences in concentration behaviour of the Cu-Cl mode for activated and deactivated Cu electrodes are discussed.