DNA-Enabled Self-Assembly of Plasmonic Nanoclusters


Jonathan A. Fan, Yu He, Kui Bao, Chihhui Wu, Jiming Bao, Nicholas B. Schade, Vinothan N. Manoharan, Gennady Shvets, Peter Nordlander, David R. Liu, and Federico Capasso. 2011. “DNA-Enabled Self-Assembly of Plasmonic Nanoclusters.” Nano Letters, 11, 11, Pp. 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.
Last updated on 05/23/2020