P1.8.10 Work Function Gas Sensors at Room Temperature by means of Conductive Polypyrrole Thin-films
- 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)
- C. Zamarreño, I. Matias, F. Arregui - Public University of Navarra, Campus Arrosadia (Spain), P. Davydovskaya, R. Pohle, M. Fleischer - SIEMENS AG (Germany)
- Pages
- 1137 - 1140
- DOI
- 10.5162/IMCS2012/P1.8.10
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
This work presents a first approach to the fabrication of room temperature floating gate GasFETs based on the readout of the work function of conductive polypyrrole (PPy) coatings. PPy coatings have been fabricated onto Au and Pt coated alumina substrates by means of the in-situ polymerization technique. The response of the coatings to different gases and volatile organic compounds (VOCs), such as ethanol, acetone, methylamine or isopropanol and gases has been tested using the Kelvin probe (KP) setup. Results have revealed good sensitivities to isopropanol and methylamine at room temperature. Relative humidity (RH) was found to be a decisive factor, which conditioned the sensitivity of the coatings to VOCs and gases as well as the overall coating response. Additionally, good sensitivity to low weight hydrocarbons was found when the substrate was heated to 180ºC.