Toggle Main Menu Toggle Search

Open Access padlockePrints

Smooth and conductive DNA-templated Cu2O nanowires: growth morphology, spectroscopic and electrical characterization

Lookup NU author(s): Dr Reda Hassanien, Professor Lidija Siller, Professor Nick Wright, Professor Andrew Houlton, Dr Ben Horrocks

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

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.


Publication metadata

Author(s): Hassanien R, Al-Said SAF, Siller L, Little R, Wright NG, Houlton A, Horrocks BR

Publication type: Article

Publication status: Published

Journal: Nanotechnology

Year: 2012

Volume: 23

Issue: 7

Print publication date: 20/01/2012

ISSN (print): 0957-4484

ISSN (electronic): 1361-6528

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/0957-4484/23/7/075601

DOI: 10.1088/0957-4484/23/7/075601


Altmetrics

Altmetrics provided by Altmetric


Actions

Find at Newcastle University icon    Link to this publication


Share