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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.

SUBMITTER: Fan JA

PROVIDER: S-EPMC3478945 | biostudies-literature | 2011 Nov

REPOSITORIES: biostudies-literature

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DNA-enabled self-assembly of plasmonic nanoclusters.

Fan Jonathan A JA He Yu Y Bao Kui K Wu Chihhui C Bao Jiming J Schade Nicholas B NB Manoharan Vinothan N VN Shvets Gennady G Nordlander Peter P Liu David R DR Capasso Federico F

Nano letters 20111025 11

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. ...[more]

PMID: 22007607

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