Plasmonic resonances of crescent-shaped nanoparticles respond to the attachment of colloidal particles by a shift of the resonance wavelength, as predicted in numerical simulations using FEM.

A. Unger, et al. Sensitivity of Crescent-Shaped Metal Nanoparticles to Attachment of Dielectric Colloids. Nano Lett. 9, 2311 (2009).

DOI: 10.1021/nl900505a