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Chemical and electrochemical routes to DNA-templated rhodium nanowires

Lookup NU author(s): Hasan Mohamed, Dr Scott Watson, Dr Ben HorrocksORCiD, Professor Andrew HoultonORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

Two methods for the preparation of rhodium nanowires are described: (i) electroless metal deposition at duplex DNA 'template' molecules in bulk solution and (ii) electrochemical reduction in DNA-containing solution at a modified electrode. Both methods render essentially similar 1D nanostructures with a Rh/Rh-oxide core-shell structure. AFM studies revealed the resulting nanostructures are typically < 10 nm in diameter with continuous and smooth metal coatings. However, the latter method was less effective with samples containing an similar to 3-fold increase in the bare template DNA remaining. A combination of SPM methods demonstrated the structures to be electrically conducting, hence confirming their nanowire nature. The conductivity was, however, several orders of magnitude lower than that of bulk Rh; a fact attributed to the presence of resistance-increasing mechanisms, such as grain boundaries present in the Rh coatings and electron surface scattering.

Publication metadata

Author(s): Mohamed HDA, Watson SMD, Horrocks BR, Houlton A

Publication type: Article

Publication status: Published

Journal: Journal of Materials Chemistry C

Year: 2015

Volume: 3

Issue: 2

Pages: 438-446

Print publication date: 01/01/2015

Online publication date: 19/11/2014

Acceptance date: 19/11/2014

Date deposited: 26/01/2015

ISSN (print): 2050-7526

ISSN (electronic): 2050-7534

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/c4tc02307b

DOI: 10.1039/c4tc02307b

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