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Zeolite coated interdigital capacitors as a new type of gas sensor |
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| Authors: | K Alberti J Haas C Plog and F Fetting |
| Affiliation: | a Institut für Chemische Technologie der TH Darmstadt, Petersenstr. 20, D-6100 Darmstadt F.R.G. b Dornier GmbH, Postfach 1360, D-7990 Friedrichshafen 1 F.R.G. |
| Abstract: | The adsorption of a gas influences the dielectric constant of zeolites. This property is used as the sensitive component of a gas sensor. Planar interdigital capacitors were coated with thin films of zeolites. When gas molecules are adsorbed, the dielectric constant of the zeolite is altered, which causes a change in the capacitance of the interdigital capacitor. This change is strongly dependent on the concentration of adsorbate in the gas phase. |
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