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Precision control of single-molecule electrical junctions.

Haiss, Wolfgang and Wang, Changsheng and Grace, Iain and Batsanov, Andrei S. and Schiffrin, David J. and Higgins, Simon J. and Bryce, Martin R. and Lambert, Colin J. and Nichols, Richard J. (2006) Precision control of single-molecule electrical junctions. Nature Materials, 5. pp. 995-1002. ISSN 1476-1122

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Abstract

There is much discussion of molecules as components for future electronic devices. However, the contacts, the local environment and the temperature can all affect their electrical properties. This sensitivity, particularly at the single-molecule level, may limit the use of molecules as active electrical components, and therefore it is important to design and evaluate molecular junctions with a robust and stable electrical response over a wide range of junction configurations and temperatures. Here we report an approach to monitor the electrical properties of single-molecule junctions, which involves precise control of the contact spacing and tilt angle of the molecule. Comparison with ab initio transport calculations shows that the tilt-angle dependence of the electrical conductance is a sensitive spectroscopic probe, providing information about the position of the Fermi energy. It is also shown that the electrical properties of flexible molecules are dependent on temperature, whereas those of molecules designed for their rigidity are not.

Item Type: Article
Journal or Publication Title: Nature Materials
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 550
Deposited By: Prof Colin J. Lambert
Deposited On: 20 Jun 2007
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:13
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/550

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