dc.creator Stidham, Howard D. en_US dc.creator Harris, Scott M. en_US dc.date.accessioned 2006-06-15T14:48:50Z dc.date.available 2006-06-15T14:48:50Z dc.date.issued 1983 en_US dc.identifier 1983-RG-07 en_US dc.identifier.uri http://hdl.handle.net/1811/11919 dc.description Author Institution: Department of Chemistry, University of Massachusetts Amherst en_US dc.description.abstract Depolarization ratios of surface enhanced Raman scattering (SERS) active fundamentals of pyridine in acqueous sodium borohydride generated silver sols are reported for a number of different pyridine concentrations. Observed depolarization ratios fluctuate substantially in intervals of time short compared with the time required to complete depolarization ratio measurements. These ratios are between 1 and 1/3, are essentially the same for all SERS active pyridine vibrations in a particular preparation, and evolve in time toward a limiting value of 1/3. Dispersion of polarization which evolves in time is found in the so-called molecule-metal stretching vibration found near $225 cm^{-1}$. A simple physical model of the scattering process is suggested which accords closely enough with these facts to be useful while retaining sufficient simplicity to allow qualitative insight into the behaviour of these complex colloidal systems. en_US dc.format.extent 87523 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title AQUEOUS PYRIDINE BOROHYDRIDE-SILVER SOLS. I. DEPOLARIZATION RATIOS AND POLARIZATION DISPERSION en_US dc.type article en_US
﻿