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Pure Appl. Chem., 2001, Vol. 73, No. 12, pp. 2001-2004

Chalcogenide-based chemical sensors for atmospheric pollution control

S. Marian1,2*, D. Tsiulyanu2, T. Marian2 and H.-D. Liess1

1 University of the Federal Armed Forces Munich, Faculty of Electrical Engineering, Institute of Physics, Werner-Heisenberg-Weg 39, D-85579 Neubiberg, Germany
2 Technical 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 are considered.