Gap-mode Plasmon Enhanced Raman Spectroscopy for in-situ Observation of Atomically Flat Single Crystalline Metal Electrode Surfaces
Surface-enhanced Raman scattering (SERS) is widely utilized as a powerful spectroscopic tool for studying molecules adsorbed on metal surfaces, especially in electrochemical conditions. The signal enhancement of Raman scattering is mainly caused by field enhancement at a metal surface. Therefore, excitation of surface plasmon polaritons is the key issue in SERS events, and application of conventional SERS is limited to rough metal surfaces. However, since various adsorption sites are exposed on such substrates, information of each adsorption site is not available and SERS spectra provide only averaged information. Besides, efficient plasmonic field enhancement is available only at coinage metals with rough surfaces such as Au, Ag, Cu, etc. Unfortunately, most of other metals, including catalytic metals such as Pt and Pd, are commonly considered to be non-SERS-active because of the large imaginary part of the dielectric constant.
Katsuyoshi IKEDA Kohei UOSAKI
Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 0810, JAPAN
国际会议
The Twelfth International Symposium on Electroanalytical Chemistry(第十二届国际电分析化学会议 12th ISEC)
长春
英文
149-151
2009-08-12（万方平台首次上网日期，不代表论文的发表时间）