SURFACE-ENHANCED RAMAN-SCATTERING FROM CHLORIDE ON COPPER ELECTRODES

被引:51
作者
NIAURA, G
MALINAUSKAS, A
机构
[1] Institute of Chemistry, Vilnius
关键词
D O I
10.1016/0009-2614(93)89029-H
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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-1 are attributed to Cu-Cu vibrations by isotopic (Cu-63/Cu-65) 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 nu(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.
引用
收藏
页码:455 / 460
页数:6
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