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Microscopic Theory of Surface-Enhanced Raman Scattering in Noble-Metal Nanoparticles Vitaliy

Published online by Cambridge University Press:  01 February 2011

N. Pustovit  and
Tigran V. Shahbazyan
N. Pustovit
Affiliation:
Department of Physics, Jackson State University, Jackson MS 39217
Tigran V. Shahbazyan
Affiliation:
Department of Physics, Jackson State University, Jackson MS 39217
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Abstract

We study the role of a strong electron confinement on the surface-enhanced Raman scattering from molecules adsorbed on small noble-metal nanoparticles. We describe a novel enhancement mechanism which originates from the different effect that confining potential has on s-band and d-band electrons. We demonstrate that the interplay between finite-size and screening efects in the nanoparticle surface layer leads to an enhancement of the surface plasmon local field acting on a molecule located in a close proximity to the metal surface. Our calculations, based on time-dependent local density approximation, show that the additional enhancement of the Raman signal is especially strong for small nanometer-sized nanoparticles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 846: Symposium DD – Organic and Nanocomposite Optical Materials , 2004 , DD8.9
Copyright
Copyright © Materials Research Society 2005

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References

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