Peveler, W. J. , Binions, R., Hailes, S. M.V. and Parkin, I. P. (2013) Detection of explosive markers using zeolite modified gas sensors. Journal of Materials Chemistry A, 1(7), pp. 2613-2620. (doi: 10.1039/c2ta01027e)
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Abstract
Detection of hidden explosive devices is a key priority for security and defence personnel around the globe. Electronic noses, based on metal oxide semiconductors (MOS), are a promising technology for creating inexpensive, portable and sensitive devices for such a purpose. An array of seven MOS gas sensors was fabricated by screen printing, based on WO3 and In2O3 inks. The sensors were tested against six gases, including four explosive markers: nitromethane, DMNB (2,3-dimetheyl-2,3-dinitrobutane), 2-ethylhexanol and ammonia. The gases were successfully detected with good sensitivity and selectivity from the array. Sensitivity was improved by overlaying or admixing the oxides with two zeolites, H-ZSM-5 and TS-1, and each showed improved responses to –NO2 and –OH moieties respectively. Admixtures in particular showed promise, with excellent sensitivity and good stability to humidity. Machine learning techniques were applied to a subset of the data and could accurately classify the gases detected, even when confounding factors were introduced.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Peveler, Dr William |
Authors: | Peveler, W. J., Binions, R., Hailes, S. M.V., and Parkin, I. P. |
College/School: | College of Science and Engineering > School of Engineering > Biomedical Engineering |
Journal Name: | Journal of Materials Chemistry A |
Publisher: | Royal Society of Chemistry |
ISSN: | 2050-7488 |
ISSN (Online): | 2050-7496 |
Published Online: | 18 December 2012 |
Copyright Holders: | Copyright © 2013 The Royal Society of Chemistry |
First Published: | First published in Journal of Materials Chemistry A 1(7): 2613-2620 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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