P1.8.11 Surface-engineered Sensors: Polymer-based Sensors for the Capacitive Detection of Organic Pollutants in Water
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.8 Sensors Based on New Materials
- Author(s)
- J. Staginus, I. Aerts, L. de Smet, E. Sudhölter - Department of Chemical Engineering, Delft University of Technology (The Netherlands), Z. Chang, G. Meijer - Department of Electrical Engineering, Delft University of Technology (The Netherlands)
- Pages
- 1141 - 1144
- DOI
- 10.5162/IMCS2012/P1.8.11
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
The matured technology of electronic noses and tongues makes it promising to utilize the technique of combining chemically diverse sensor multi-arrays with multi-component analysis tools and pattern recognition techniques for a wider range of medical and environmental applications. With a selfdesigned sensor system and flow cell setup-up we studied the capacitive response of a polydimethyl siloxane (PDMS) covered interdigitated electrode (IDE) sensor upon exposure to methyl tert-butyl ether (MtBE) contaminated MilliQ water and plain mineral water. The sensor responded to MtBE concentrations as low as 2 ppm for both aqueous solutions with full reversibility. Signal drifts due to temperature effects can be remedied by sensor calibration. State-of-the-art sensor interfaces, system minimization and integration, and smart sensing layer design promise further significant optimization possibilities for system sensitivity, stability and response time.