DNA-enabled self-assembly of plasmonic nanoclusters.
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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. |
Year of Publication | 2011
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Journal | Nano Lett
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Volume | 11
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Issue | 11
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Pages | 4859-64
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Date Published | 2011 Nov 09
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ISSN | 1530-6992
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DOI | 10.1021/nl203194m
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PubMed ID | 22007607
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PubMed Central ID | PMC3478945
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Grant list | Howard Hughes Medical Institute / United States
R01 GM065865 / GM / NIGMS NIH HHS / United States
R01GM065865 / GM / NIGMS NIH HHS / United States
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