Abstract
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•Facile synthesis and characterization of CuO nanoplates.•Utilization of CuO nanoplates for selective and high-response ethanol gas sensor application.•Sensor device showed 176% response at an operating temperature of 250 °C for 100 ppm ethanol concentration.•Highly selective towards ethanol in presence of various other gases such as NO2, CO2, CH4 and H2.
Herein, ethanol (C2H5OH) sensing properties of nanocrystalline copper oxide (CuO) nanoplates were investigated. The resistive chemi-sensor devices based on CuO nanoplates were fabricated for the enhanced and selective sensing of ethanol gas. The fabricated sensor exhibited a high ethanol response of 176% towards ethanol gas concentration of 100 ppm at 250 °C. At optimized reaction conditions, in presence of various gases, i.e. NO2, CO2, CH4, and H2, the response of the fabricated sensor was highest which confirmed the high-selectivity. The fabricated CuO nanoplates based gas sensor was also employed for transient ethanol response and stability.