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Surface enhanced Raman Active Nanoparticles in Plasma Treated Silver surfaces

Published online by Cambridge University Press:  10 February 2011

G. Compagnini ,
B. Pelligra  and
B. Pignataro
G. Compagnini
Affiliation:
Dipartimeto di Scienze Chimiche, Universiti di Catania - V.le A.Doria 6 - 95125 Catania (Italy)
B. Pelligra
Affiliation:
Dipartimeto di Scienze Chimiche, Universiti di Catania - V.le A.Doria 6 - 95125 Catania (Italy)
B. Pignataro
Affiliation:
Dipartimeto di Scienze Chimiche, Universiti di Catania - V.le A.Doria 6 - 95125 Catania (Italy)
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Abstract

A plasma oxidation-reduction process has been found to be suitable to produce silver surfaces showing Surface Enhanced Raman (SER) activity. SER spectra of monodisperse polystyrene films and of other smaller molecules like alkanethiole, have been obtained in order to study the correlation between enhancement and nanomorphology as probed by Atomic Force Microscopy. It was found that the enhancement is strongly correlated with a coalescence of the initially present silver grains (10–50 nm in size). This coalescence leads to the formation of 100–300 nm silver hills in which each silver grain is still clearly distinguishable. The increase of the effective surface area due to the particle coalescence has been correlated to the SERS enhancement in straightforward fashion while self assembled alkanethiole monolayers have been used as spacer for electromagnetic SERS enhancement of polystyrene.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 109
Copyright
Copyright © Materials Research Society 1998

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References

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