Surface-enhanced Raman spectroscopy from colloids at high pressures

Michael Bradley, John Krech, Shlomo Efrima

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

High pressure surface enhanced Raman (SERS) spectra are reported for a highly dense silver colloidal suspension, termed a MEtal Liquid-Like Film or MELLF. Comparison is made with the SERS spectrum of a dilute organosol. Raman signals due to adsorbed molecules and the solvent dichloromethane reveal appreciable frequency shifts as the colloidal environment is influenced by temperature, pressure, and packing. The C-Cl stretch of neat dichloromethane near 705 cm-1 shifts 1.7 cm-1 blue in a MELLF. Raman signals due to the adsorbed anisic acid in MELLFs blue shift about 2 cm-1 as 4 kilobars of pressure are applied; the solvent peaks shift blue only about 1 cm-1. Temperature influences the MELLF in two ways: desorption of anisic acid and formation of agglomerated particles.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages227-230
Number of pages4
ISBN (Print)1558991840
StatePublished - 1 Jan 1993
Externally publishedYes
EventSymposium on Atomic-scale Imaging of Surfaces and Interfaces -
Duration: 30 Nov 19922 Dec 1992

Publication series

NameMaterials Research Society Symposium Proceedings
Volume289
ISSN (Print)0272-9172

Conference

ConferenceSymposium on Atomic-scale Imaging of Surfaces and Interfaces
Period30/11/922/12/92

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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