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18 August 2005 Quantum-mechanical approach to surface-enhanced Raman scattering
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Abstract
We present a microscopic model for surface-enhanced Raman scattering (SERS) from molecules adsorbed on small noble-metal nanoparticles. We demonstrate that, in nanometer-sized particles, SERS is determined by a competition between two distinct quantum-size effects: Landau damping of surface plasmon resonance and reduced screening near nanoparticle surface. The first mechanism comes from the discreteness of energy spectrum in a nanoparticle and leads to a general decrease in SERS. The second mechanism originates from the different effect of confining potential on sp-band and d-band electron states and leads to a relative increase in SERS. We calculate numerically the spatial distribution of local field near the surface and the enhancement factor for different nanoparticles sizes.
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Vitaliy N. Pustovit and Tigran V. Shahbazyan "Quantum-mechanical approach to surface-enhanced Raman scattering", Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 592709 (18 August 2005); https://doi.org/10.1117/12.618229
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