Surface plasmon resonances in strongly coupled gold nanosphere chains from monomer to hexamer.

Barrow, Steven J; Funston, Alison M; Gómez, Daniel E; Davis, Tim J; Mulvaney, Paul · Nano Lett · 2011

basic_science · Level V

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Abstract

We present experimental data on the light scattering properties of linear chains of gold nanoparticles with up to six nanoparticles and an interparticle spacing of 1 nm. A red shift of the surface plasmon resonance with increasing chain length is observed. An exponential model applied to the experimental data allows determination of an asymptotic maximum resonance at a chain length of 10-12 particles. The optical data are compared with analytical and numerical calculation methods (EEM and BEM).

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