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Lookup NU author(s): Dr Reda Hassanien,
Professor Lidija Siller,
Professor Nick Wright,
Professor Andrew Houlton,
Dr Ben Horrocks
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DNA strands have been used as templates for the self-assembly of smooth and conductive cuprous oxide (Cu2O) nanowires of diameter 12-23 nm and whose length is determined by the template (16 mu m for lambda-DNA). A combination of spectroscopic, diffraction and probe microscopy techniques showed that these nanowires comprise single crystallites of Cu2O bound to the DNA molecules which fused together over time in a process analogous to Ostwald ripening, but driven by the free energy of interaction with the template as well as the surface tension. Electrical characterization of the nanowires by a non-contact method, scanned conductance microscopy and by contact mode conductive AFM showed the wires are electrically conductive. The conductivity estimated from the AFM cross section and the zero-bias conductance in conductive AFM experiments was 2.2-3.3 S cm(-1). These Cu2O nanowires are amongst the thinnest reported and show evidence of strong quantum confinement in electronic spectra.
Author(s): Hassanien R, Al-Said SAF, Siller L, Little R, Wright NG, Houlton A, Horrocks BR
Publication type: Article
Publication status: Published
Print publication date: 20/01/2012
ISSN (print): 0957-4484
ISSN (electronic): 1361-6528
Publisher: Institute of Physics Publishing Ltd.
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