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Identification of vapours using a single carbon black/polymer composite sensor and a novel temperature modulation technique
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Iwaki, Takao, Covington, James A. and Gardner, J. W. (2007) Identification of vapours using a single carbon black/polymer composite sensor and a novel temperature modulation technique. In: 6th IEEE Sensors Conference, Atlanta, GA, 28-31 Oct 2007. Published in: 2007 IEEE Sensors : Computational Intelligence and Intelligent Informatics, Volume 1-3 pp. 1229-1232. ISBN 9781424412617. doi:10.1109/ICSENS.2007.4388631 ISSN 1930-0395.
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Official URL: http://dx.doi.org/10.1109/ICSENS.2007.4388631
Abstract
Here we report on a novel method to measure the concentration of different vapours in air using a single carbon black/polymer composite resistive sensor. A carbon black/polyvinylpyrrolidone (PVP) composite film was deposited onto a single crystal silicon micro-hotplate, and its temperature stepped between 25 degrees C and 35 degrees C. We have extracted a novel pre-processing feature that we describe as the "fractional transient response", which is produced from analyzing the temperature transients measured with and without vapours. We have found that the shape of the, fractional difference of transient conductance curve depends only on vapour type and so can be used for vapour identification; whereas the amplitude of fractional difference of transient conductance curves is proportional to the concentration of the vapour and so can be used to predict vapour concentration. Therefore, we show experimentally that it is possible to detect different vapours using a single carbon black polymer/composite sensor. Results are given for detecting water, methanol and ethanol vapours in ambient air.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Series Name: | IEEE Sensors | ||||
| Journal or Publication Title: | 2007 IEEE Sensors : Computational Intelligence and Intelligent Informatics | ||||
| Publisher: | IEEE | ||||
| ISBN: | 9781424412617 | ||||
| ISSN: | 1930-0395 | ||||
| Official Date: | 2007 | ||||
| Dates: |
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| Volume: | Volume 1-3 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | pp. 1229-1232 | ||||
| DOI: | 10.1109/ICSENS.2007.4388631 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 6th IEEE Sensors Conference | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Atlanta, GA | ||||
| Date(s) of Event: | 28-31 Oct 2007 |
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