Nature of Surface-Enhanced-Raman-Scattering Active Sites on Coldly Condensed Ag Films
- 19 December 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 51 (25), 2314-2317
- https://doi.org/10.1103/physrevlett.51.2314
Abstract
Evidence is presented that coldly deposited Ag films are highly porous and that the pores persist up to 170 K but are heated out at 250 K. Diffusion of adsorbed pyridine into the pores is negligible below 60 K but readily takes place at 130 K. Theoretical results on the classical electromagnetic enhancement of the Raman cross section within the pores as well as a survey of published surface-enhanced Raman-scattering data lead the authors to conclude that the surface-enhanced Raman-scattering active sites of coldly deposited Ag films are within the pores.Keywords
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