Microscopic model for SERS in noble-metal nanoparticles

Vitaliy N. Pustovit; Tigran V. Shahbazyan

doi:10.1117/12.588063

31 March 2005 Microscopic model for SERS in noble-metal nanoparticles

Vitaliy N. Pustovit, Tigran V. Shahbazyan

Proceedings Volume 5703, Plasmonics in Biology and Medicine II; (2005) https://doi.org/10.1117/12.588063
Event: SPIE BiOS, 2005, San Jose, CA, United States

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.

Citation Download Citation

Vitaliy N. Pustovit and Tigran V. Shahbazyan "Microscopic model for SERS in noble-metal nanoparticles", Proc. SPIE 5703, Plasmonics in Biology and Medicine II, (31 March 2005); https://doi.org/10.1117/12.588063

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