Chalcogenide-based chemical sensors for atmospheric pollution control*
S. Marian1,2,**, D. Tsiulyanu2, T. Marian2, and H.-D. Liess1
1University of the Federal Armed Forces Munich, Faculty
of Electrical Engineering, Institute of Physics, Werner-Heisenberg-Weg
39, D-85579 Neubiberg, Germany; 2Technical University, Department of
Physics, Datchia Street 41, MD-2060 Chishinau, Moldova
Abstract: The authors report about characterization of chalcogenide-based
thin films, as a materials for gas-sensing applications. The sensing
behavior of the AsSTe films was tested with environmental
pollutant gases such as NO2, CO, and SO2. A significant sensitivity
has been observed for nitrogen dioxide. The detection range for NO2
was between 0.951.9 ppm in ambient air. The response and the recovery
time is rapid, with good reproducibility and high sensibility. All the
measurements were performed at room temperature. Gas-sensing applications
* An issue of reviews and research papers based on
presentations made at the IUPAC/ICSU Workshop on
Electrochemistry and Interfacial Chemistry in Environmental Clean-up
and Green Chemical Processes, Coimbra, Portugal, 6-7 April, 2001.
** Corresponding author.
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