Session X34: Nanostructures: Assembly, Growth, and Characterization

2:30 PM–5:30 PM, Thursday, March 24, 2011
Room: C141

Sponsoring Unit: DCMP
Chair: Eric Stinaff, Ohio University

Abstract ID: BAPS.2011.MAR.X34.5

Abstract: X34.00005 : Programmable Nanofabrication of Nanoparticle Assemblies of arbitrarily Shapes on DNA Templates

3:18 PM–3:30 PM

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  Mauricio Pilo-Pais
    (Duke University)

  Sarah Goldberg
    (Duke University)

  Enrique Samano
    (CNyN-UNAM, Ensenada, B.C., M\'exico)

  Henok Mebrahtu
    (Duke University)

  Thomas LaBean
    (Duke University)

  Gleb Finkelstein
    (Duke University)

We present a method for producing metallic structures with nanoscale dimensions and programmable design. Rectangular ``DNA origami'' structures ($\sim $90x70nm) were modified to have uniquely coded binding sites and adsorbed onto silicon dioxide substrates. Gold nanoparticles functionalized with a complimentary DNA sequence were attached to these binding sites in a highly controllable fashion. The seed nanoparticles were then enlarged (and even fused, if desired) by a silver reduction chemistry. Using this method we constructed a variety of metallic structures, including parallel wires, H-shapes, and rings. Due to the flexibility of the design and the multiply parallel nature of the method, these structures may offer great promise for plasmonic applications.

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