title: Three-dimensional plasmonic nanoclusters.
abstract: Assembling nanoparticles into well-defined structures is an important way to create and tailor the optical properties of materials. Most advances in metamaterials research to date have been based on structures fabricated in two-dimensional planar geometries. Here, we show an efficient method for assembling noble metal nanoparticles into stable, three-dimensional (3-D) clusters, whose optical properties can be highly sensitive or remarkably independent of cluster orientation, depending on particle number and cluster geometry. Some of the clusters, such as tetrahedra and icosahedra, could serve as the optical kernels for metafluids, imparting metamaterial optical properties into disordered media such as liquids, glasses, or plastics, free from the requirement of nanostructure orientation.
authors: Department of Electrical and Computer Engineering, Rice University , Houston, Texas 77005, United States.
authors: Alexander S
authors: AS
authors: Urban
authors: Xiaoshuang
authors: X
authors: Shen
authors: Yumin
authors: Y
authors: Wang
authors: Nicolas
authors: N
authors: Large
authors: Hong
authors: H
authors: Wang
authors: Mark W
authors: MW
authors: Knight
authors: Peter
authors: P
authors: Nordlander
authors: Hongyu
authors: H
authors: Chen
authors: Naomi J
authors: NJ
authors: Halas
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold