ENHANCED RAMAN INTENSITY OF MOLECULES ADSORBED ON METAL-SURFACES EXPERIMENTS AND THEORY

The results of AES, SIMS and SEM studies of silver surfaces which have been electrochemically oxidized and reduced in aqueous chloride solutions show that the processing yields a highly purified layer of metallic silver with a monolayer of chloride. The Raman peak reported at 240 cm-1 for such surfaces is attributed to a surface chloride vibration, an assignment supported by lattice-sum calculations that include image charge effects. © 1979.