title: DNA-enabled self-assembly of plasmonic nanoclusters.
abstract: DNA nanotechnology provides a versatile foundation for the chemical assembly of nanostructures. Plasmonic nanoparticle assemblies are of particular interest because they can be tailored to exhibit a broad range of electromagnetic phenomena. In this Letter, we report the assembly of DNA-functionalized nanoparticles into heteropentamer clusters, which consist of a smaller gold sphere surrounded by a ring of four larger spheres. Magnetic and Fano-like resonances are observed in individual clusters. The DNA plays a dual role: it selectively assembles the clusters in solution and functions as an insulating spacer between the conductive nanoparticles. These particle assemblies can be generalized to a new class of DNA-enabled plasmonic heterostructures that comprise various active and passive materials and other forms of DNA scaffolding.
authors: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, United States.
authors: Jonathan A
authors: JA
authors: Fan
authors: Yu
authors: Y
authors: He
authors: Kui
authors: K
authors: Bao
authors: Chihhui
authors: C
authors: Wu
authors: Jiming
authors: J
authors: Bao
authors: Nicholas B
authors: NB
authors: Schade
authors: Vinothan N
authors: VN
authors: Manoharan
authors: Gennady
authors: G
authors: Shvets
authors: Peter
authors: P
authors: Nordlander
authors: David R
authors: DR
authors: Liu
authors: Federico
authors: F
authors: Capasso
mesh_terms: D004247:DNA / Q000737:chemistry* / Q000648:ultrastructure*; D004553:Electric Conductivity; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D004247:DNA