Optimizing Gold Nanoparticle Cluster Configurations (n ≤ 7) for Array Applications.

ABSTRACT: Nanoparticle cluster arrays (NCAs) are novel electromagnetic materials whose properties depend on the size and shape of the constituent nanoparticle clusters. A rational design of NCAs with defined optical properties requires a thorough understanding of the geometry dependent optical response of the building blocks. Herein, we systematically investigate the near- and far-field responses of clusters of closely packed 60 nm gold nanoparticles (n ≤ 7) as a function of size and cluster geometry through a combination of experimental spectroscopy and generalized Mie Theory calculations. From all of the investigated cluster configurations, nanoparticle trimers with D(3h) geometry and heptamers in D(6h) geometry stand out due to their polarization insensitive responses and high electric (E-) field

SUBMITTER: Yan B 

PROVIDER: S-EPMC3095971 | biostudies-literature | 2011 Mar

REPOSITORIES: biostudies-literature