Real-time vapour sensing using an OFET-based electronic nose and genetic programming

Wedge, D. C., Das, A., Dost, R., Kettle, J., Madec, M.-B., Morrison, J. J., Grell, M., Kell, D. B., Richardson, T. H. and Yeates, S. (2009) Real-time vapour sensing using an OFET-based electronic nose and genetic programming. Sensors and Actuators B: Chemical, 143(1), pp. 365-372. (doi: 10.1016/j.snb.2009.09.030)

Abstract

Electronic noses (e-noses) are increasingly being used as vapour sensors in a range of application areas. E-noses made up of arrays of organic field-effect transistors (OFETs) are particularly valuable due the range and diversity of the information which they provide concerning analyte binding. This study demonstrates that arrays of OFETs, when combined with a data analysis technique using Genetic Programming (GP), can selectively detect airborne analytes in real time. The use of multiple parameters – on resistance, off current and mobility – collected from multiple transistors coated with different semiconducting polymers gives dramatic improvements in the sensitivity (true positive rate), specificity (true negative rate) and speed of sensing. Computer-controlled data collection allows the identification of analytes in real-time, with a time-lag between exposure and detection of the order of 4 s.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kettle, Professor Jeff
• Authors: Wedge, D. C., Das, A., Dost, R., Kettle, J., Madec, M.-B., Morrison, J. J., Grell, M., Kell, D. B., Richardson, T. H., and Yeates, S.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Sensors and Actuators B: Chemical
• Publisher: Elsevier
• ISSN: 0925-4005
• ISSN (Online): 1873-3077
• Published Online: 23 September 2009