Raman spectroscopic studies of acoustic vibrations from sers active substrates

Abstract

Raman scattering measurements for both frequency and intensity of acoustic vibrations arising from silver roughened surface features and colloidal particles have allowed to approach the shape and size distribution curves of the resonant particles responsible for surface enhanced Raman scattering (SERS). These distributions are compared to those deduced from atomic force microscopy images (AFM), scanning electronic (SEM) and transmission electronic microscopies (TEM) micrographs. The size scale of the protusions which can be observed by these techniques is found to be an order of magnitude greater than that deduced from Raman scattering experiments.