CO Gas-Sensing at Low Temperature Using CuO Thin Films

Title: CO Gas-Sensing at Low Temperature Using CuO Thin Films
Author: Sumita Choudhary{1}, Ajay Agarwal{2}, Arnab Hazra{1}, Subhashis Gangopadhyay{1}
Affiliation: {1}Birla Institute of Technology and Science, Pilani, India; {2}CSIR-Central Electronics Engineering Research Institute, India
Abstract: Carbon monoxide (CO) is known as a silent killer, as breathing in CO gas ambient for long periods with a concentration above the tolerance limit can cause severe health hazards and even death. CO concentration as low as 30 ppm (parts per million) inhaling for few hours can significantly affects the human health. This work focuses on CO gas sensing behaviors of cupric oxide (CuO) nanostructures at relatively lower operating temperature (150°C). The sensors show significant sensitivity for 25 ppm CO gas with fast response and recovery times as well as good reproducibility. Thin films of CuO are formed by thermal oxidation, in air ambient, of vacuum deposited thin copper films on glass substrates. CO sensing properties of CuO thin film were evaluated for different operating temperatures (150-250°C) and concentrations. The CuO nanostructure shows the maximum CO sensitivity for an operating temperature of 230°C. However, CO response increases with the CO concentration, which is finally saturates for a particular operating temperature.

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Ma'am can i get your thesis in pdf plz