CuO nanostructured sensors for enhanced CO detection
Résumé
In order to increase the selectivity of semi-conducting gas sensors CuO, ZnO nanostructures have been integrated as sensitive layers on silicon substrates. A metalorganic approach has been employed for the preparation of CuO and ZnO anisotropic nanoparticles. Their gas sensing performance towards CO, C 3 H 8 have been tested. The influence of the oxide nature is significant on the sensor response level and its selectivity to the reducing gases. Moreover, at an operating temperature T = 200°C, the sensors present an optimum performance towards CO with fast response and recovery time, unprecedented sensitivity (Rn= ca. 150%, 100 ppm CO, RH 50%) and selectivity as compared to NO 2 , C 3 H 8 and NH 3. Thus, these results highlight the remarkable role of CuO on the fabrication of very promising CO gas sensors. Motivation and results
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