Theoretical study of coated spherical metallic nanoparticles for single-molecule surface-enhanced spectroscopy

Xu, Hongxing
December 2004
Applied Physics Letters;12/13/2004, Vol. 85 Issue 24, p5980
Academic Journal
We investigate the possibility to use coated metallic nanoparticles for single-molecule surface-enhanced spectroscopy by extending the Mie theory. The aggregates of metallodielectric spheres of Au and Ag show a strong local intensity enhancement in the cavity between particles, which can result in up to a 1014-fold increase for surface-enhanced Raman scattering. We also examine the thickness of the coating layer, the size of the core, and the incident wavelength that determine the enhancement.


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