A multiplexed impedance analyzer for characterizing polymer-coated QCM sensor arrays

Mills, C.A., Chai, K.T.C., Milgrew, M.J., Glidle, A., Cooper, J.M. and Cumming, D.R.S. (2006) A multiplexed impedance analyzer for characterizing polymer-coated QCM sensor arrays. IEEE Sensors Journal, 6(4), pp. 996-1002. (doi:10.1109/JSEN.2006.877936)

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Publisher's URL: http://dx.doi.org/10.1109/JSEN.2006.877936

Abstract

This paper describes the development and evaluation of a custom-built impedance analyzer, which uses a multiplexing bridge circuit to characterize an array of polymer-coated quartz crystal microbalance (QCM) sensors. The analyzer is constructed on a single printed circuit board with minimum components and is sufficiently compact for integration into a handheld format. The custom-built device is used to observe the changes that occur in QCM sensors when experimental conditions such as polymer coating film thickness, odorant vapor pressure, and relative molecular mass are varied. An equivalent electric circuit for a QCM is used to model the conductance and susceptance data captured by the analyzer. The measured response of an array of QCM sensors demonstrates that the custom-built device is a suitable instrument for detecting different gases and understanding polymer–vapor interactions.

Item Type:Articles
Keywords:Array, gas detector, impedance analyzer, polymer coated, quartz crystal microbalance (QCM), sensor.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cumming, Professor David and Cooper, Professor Jonathan and Glidle, Dr Andrew
Authors: Mills, C.A., Chai, K.T.C., Milgrew, M.J., Glidle, A., Cooper, J.M., and Cumming, D.R.S.
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:IEEE Sensors Journal
Publisher:IEEE
ISSN:1530-437X
Copyright Holders:Copyright © 2006 IEEE
First Published:First published in IEEE Sensors Journal 6(4):996-1002
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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