Abstract

The electromagnetic intensity is known to be greatly enhanced at the surface of small Ag particles and to be less enhanced for larger Ag particles. Electrodynamic results show that the enhancement for other large metal particles (Au, Pt, Ni, Pd, Rh, and Ir) can be comparable with that for large Ag particles. Specifically, the calculated enhancement for Ag and Au prolate spheroids with a:b = 2 confirms earlier experimental results that show similar enhancements in spite of large differences in the Im ∊(ω). Results for catalytic metals in air and water show that significant enhancements can exist. These electrodynamic results indicate that surface-enhanced Raman scattering should be an effective approach for in situ monitoring of catalytic reactions at the surface of appropriately shaped metallic particles.

© 1986 Optical Society of America

Resonances of two-dimensional particle gratings in surface-enhanced Raman scattering

K. T. Carron, W. Fluhr, M. Meier, A. Wokaun, and H. W. Lehmann
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Multipole expansion of the scattering of light from a metal microspheroid

Lan-chan Chu and Shou-yih Wang
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Simple model for estimating the electromagnetic enhancement in surface-enhanced Raman scattering from molecules adsorbed onto metal particles coated with overlayers

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Surface electromagnetic modes in prolate spheroids of gold, aluminum, and copper

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Finite-size effects in surface-enhanced Raman scattering in noble-metal nanoparticles: a semiclassical approach

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