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Surface acoustic wave (SAW) gas sensors based on the use of carbon nanotube (CNT) networks as sensitive layers have been investigated for the detection of atmospheric gas pollutants: volatile organic compounds (VOCs), NO2, CO, and H2• SAW sensor configuration consists of a delay line made on a piezoelectric substrate (ST -X cut quartz) and a sensitive layer (CNTs) deposited between the interdigital...
The performance of a chemical gas sensor based on polycristallyne tin oxide films is strongly related to their structure, thickness and doping. In previous works we have studied the influence of the thickness on the detection by impedance spectroscopy analysis [1,2]. In the present work we have focused our attention in designing and modelizing a sensor for detection of NOx for environmental applications...
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