DNA-Enabled Self-Assembly of Plasmonic Nanoclusters


Fan, J. A. ; He, Y. ; Bao, K. ; Wu, C. ; Bao, J. ; Schade, N. B. ; Manoharan, V. N. ; Shvets, G. ; Nordlander, P. ; Liu, D. R. ; et al. DNA-Enabled Self-Assembly of Plasmonic Nanoclusters. Nano Letters 2011, 11, 4859-4864.


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.


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Last updated on 03/26/2016