Gas sensor array based on tin oxide nano structure for VOCs detection

Nguyen Xuan Thai; Nguyen Van Duy; Nguyen Duc Hoa; Chu Manh Hung; Hugo Nguyen; Nguyen Van Hieu

doi:10.15625/2525-2518/58/2/14079

Author affiliations

Authors

Nguyen Xuan Thai International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Nguyen Van Duy International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Nguyen Duc Hoa International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Chu Manh Hung International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Hugo Nguyen Uppsala University, Department of Engineering Sciences, Lägerhyddsvägen 1, 751 21 Uppsala, Sweden
Nguyen Van Hieu Faculty of Electrical and Electronic Engineering, Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha Dong district, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/58/2/14079

Keywords:

Gas sensor, gradient sensor array, electronic nose, Tin oxide nano-wire

Abstract

The detection of volatile organic compounds (VOCs) is very important in practical application in breath analysis. Thus, gas sensors based on metal oxide have been fabricated, but they lacked selectivity. One approach to resolve this task is to use array of highly sensitive and selective sensors as an electronic nose. Here we present a gas sensor array of Tin oxide nano-structure use of temperature modulation techniques. A Platinum micro-heater is accompanied with the array gas sensor. The gas sensor array was composing of five single sensors and that single sensor is located at different site from the micro heater and work at different temperatures. The gas sensing properties of the gas array sensors was investigated with VOC gases such as Ethanol, Methanol, Iso-propanol, and Acetone as well as NH₃, H₂, and H₂S. We also confirm the good selectivity of the array sensor for Ethanol, Methanol, Iso-propanol, Acetone, NH₃, H₂, and H₂S by using radar graphic method.

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