University of Illinois at Urbana-Champaign
Surface Enhanced Raman Scattering Studies in Ultrahigh Vacuum
Abstract
dc:descriptionWe have observed Raman scattering signals from carbon monoxide adsorbed on silver films deposited on a 120 K substrate that are approximately 5 orders of magnitude stronger that would be expected from the known cross section. These studies were performed in an ultrahigh vacuum chamber. This enhancement is similar to that observed off silver electrodes in electrochemical cells. The enhancement is destroyed by room temperature annealing of our films, so we infer that the surface roughness inherent in our evaporation process is essential to the enhancement mechanism. This, along with the fact that enhancement is observed for such a weakly bound system, suggests that many of the proposed mechanisms of Raman enhancement do not properly describe the observed phenomena.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Physics
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2015
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Wood, Thomas Huntington
Subjects
dc:subject × 1Rights
- Language dc:language
- eng
Identifiers
dc:identifier.*- Identifier
- (UMI)AAI8026621
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/77190