Publication Date
6-27-2018
Department
Ames Laboratory; Chemical and Biological Engineering; Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of
Campus Units
Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of, Chemical and Biological Engineering, Ames Laboratory
OSTI ID+
1460379
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.
DOE Contract Number(s)
AC02-07CH11358
Language
en
Department of Energy Subject Categories
59 BASIC BIOLOGICAL SCIENCES
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Included in
Biochemical and Biomolecular Engineering Commons, Materials Chemistry Commons, Nanoscience and Nanotechnology Commons
