### Session X34: Nanostructures: Assembly, Growth, and Characterization

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

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

MathJax On | Off     Abstract

#### Authors:

Mauricio Pilo-Pais
(Duke University)

Sarah Goldberg
(Duke University)

Enrique Samano
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.