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Effect of ambient on electrical transport properties of ultra-thin Au nanowires

Amin, Kazi Rafsanjani and Kundu, Subhajit and Biswas, Sangram and Roy, Ahin and Singh, Abhishek Kumar and Ravishankar, N and Bid, Aveek (2016) Effect of ambient on electrical transport properties of ultra-thin Au nanowires. In: APPLIED PHYSICS LETTERS, 109 (25).

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Official URL: http://dx.doi.org/10.1063/1.4972843

Abstract

In this letter we present systematic studies of the dynamics of surface adsorption of various chemicals on ultra-thin single crystalline gold nanowires (AuNW) through sensitive resistance fluctuation spectroscopy measurements coupled with ab initio simulations. We show that, contrary to expectations, the adsorption of common chemicals like methanol and acetone has a profound impact on the electrical transport properties of the AuNW. Our measurements and subsequent calculations establish conclusively that in AuNW, semiconductor-like sensitivity to the ambient arises because of changes induced in its local density of states by the surface adsorbed molecules. The extreme sensitivity of the resistance fluctuations of the AuNW to ambient suggests their possible use as solid-state sensors. Published by AIP Publishing.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 17 Feb 2017 04:53
Last Modified: 17 Feb 2017 04:53
URI: http://eprints.iisc.ernet.in/id/eprint/56253

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