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)
Included in
Biochemical and Biomolecular Engineering Commons, Materials Chemistry Commons, Nanoscience and Nanotechnology Commons
