Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 87: Surface chemical reactions
O 87.8: Vortrag
Freitag, 30. März 2012, 12:15–12:30, MA 042
Sensor Material for Small Concentration Measurement of Carbon Monoxide in Air at Room Temperature Based on Work Function Properties — •Roniyus Marjunus1,2, Stefan Simon1, Josef Biba1, Michael Görlich1, Christoph Senft1, and Walter Hansch1 — 1Universität der Bundeswehr München, Neubiberg, Germany — 2University of Lampung, Bandar Lampung, Indonesia
Carbon monoxide (CO) is a toxic gas and its measurement is very important for safety and fire protection. Until now, many CO sensors can be found in markets but most of them are based on resistance behaviour and the prices are expensive. A different approach in making sensor is using the work function properties of incorporated sensitive layer. We have concerned many materials and their stoichiometry to find a good sensitive layer. Data of work function change/Contact Potential Different (CPD) measurement with Pt-based shows a promising sensitivity. The results exhibit the work function change/CPD is around 10 mV for 30 ppm (MAK-value) of CO in dry/wet air.