Tip-Enhanced Raman Spectroscopy of Benzenethiol Adsorbed on Au and Pt Single-Crystal Surfaces

摘要

Raman Spectroscopy (RS) provides rich spectral and structural information on gaseous,liquid,and solid samples.However,the Raman process usually exhibits a very low cross section of the order of (dsigma/dGAMMA)_(RS)- 10~(-31)-10~(-28) cm~2sr~(-1).This hampers its wide application,particularly when only a small number of scatterers can be probed,as is the case for adsorbate systems on (smooth) interfaces.