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Highly sensitive alkane odour sensors based on functionalised gold nanoparticles

AlQahtani, H., Sugden, M., Puzzovio, D., Hague, L., Mullin, N., Richardson, T. and Grell, M. (2011) Highly sensitive alkane odour sensors based on functionalised gold nanoparticles. Sensors and Actuators B Chemical, 160 (1). pp. 399-404. ISSN 0925-4005


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We deposit dense, ordered, thin films of Au-dodecanethiol core/shell nanoparticles by the Langmuir-Schafer (LS) printing method, and find that their resistance at ambient temperature responds selectively and sensitively to alkane odours. Response is a rapid resistance increase due to swelling, and is strongest for alkane odours where the alkane chain is similar in length to the dodecane shell. For decane odours, we find a response to concentrations as low as 15 ppm, about 600 times below the lower explosive limit. Response is weaker, but still significant, to aromatic odours (e.g. Toluene, Xylene), while potential interferants such as polar and/or hydrogen-bonding odours (e.g. alcohols, ketones, water vapour) are somewhat rejected. Resistance is weakly dependent on temperature, and recovers rapidly and completely to its original value within the error margin of measurement. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Article
Copyright, Publisher and Additional Information: © 2011 Elsevier. This is an author produced version of a paper subsequently published in Sensors and Actuators B Chemical. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Gold nanoparticles sensors; Alkane swelling; Alkane detection; Langmuir-Schafer printing
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 22 Feb 2012 09:37
Last Modified: 08 Feb 2013 17:37
Published Version: http://dx.doi.org/10.1016/j.snb.2011.07.068
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.snb.2011.07.068
URI: http://eprints.whiterose.ac.uk/id/eprint/43731

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