Publication Date

6-27-2018

Department

Ames Laboratory; Chemical and Biological Engineering; Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of

Campus Units

Chemical and Biological Engineering, Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of, Ames Laboratory

Report Number

IS-J 9702

DOI

10.1088/1361-6528/aacb16

Journal Title

Nanotechnology

Volume Number

29

Issue Number

35

First Page

355603

Abstract

DNA origami can be used to create a variety of complex and geometrically unique nanostructures that can be further modified to produce building blocks for applications such as in optical metamaterials. We describe a method for creating metal-coated nanostructures using DNA origami templates and a photochemical metallization technique. Triangular DNA origami forms were fabricated and coated with a thin metal layer by photochemical silver reduction while in solution or supported on a surface. The DNA origami template serves as a localized photosensitizer to facilitate reduction of silver ions directly from solution onto the DNA surface. The metallizing process is shown to result in a conformal metal coating, which grows in height to a self-limiting value with increasing photoreduction steps. Although this coating process results in a slight decrease in the triangle dimensions, the overall template shape is retained. Notably, this coating method exhibits characteristics of self-limiting and defect-filling growth, which results in a metal nanostructure that maps the shape of the original DNA template with a continuous and uniform metal layer and stops growing once all available DNA sites are exhausted.

Language

en

Department of Energy Subject Categories

77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

Available for download on Thursday, June 27, 2019

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