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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.
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Marian et al. (2001) studied this question.
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