ZnO thick film gas sensor for methane sensing at room operating temperature

Che Aziz, Siti Asma and Mohd Chachuli, Siti Amaniah and Shamsudin, Nur Hazahsha and Hamid, Rosyati (2025) ZnO thick film gas sensor for methane sensing at room operating temperature. Kufa Journal of Engineering, 17 (2). pp. 464-475. ISSN 2523-0018

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Abstract

Methane (CH₄) is a strong greenhouse gas and dangerous in industrial settings, so highly sensitive and reliable sensors are needed to detect it at low concentrations. In this study, ZnO-based thick-film gas sensors were fabricated using a screen-printing technique on Kapton substrates and evaluated for methane sensing at room temperature. The device consists of an interdigitated electrode (IDE) and a ZnO sensing layer, both deposited onto the Kapton substrate via screen printing. The prepared sensors were then tested with methane at 6700 ppm and 7500 ppm concentrations. Results show that both ZnO sensors have good linearity in I-V measurements meaning that they exhibit ohmic behavior. ZnO2 sensitivity was higher than ZnO1 probably due to some microstructural differences. Resistance changes during gas exposure were used as the sensor response.

Item Type:	Article
Uncontrolled Keywords:	Binder, I-V characteristics, Methane, Screen-printing, ZnO gas sensor
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	21 Jul 2026 04:09
Last Modified:	21 Jul 2026 04:09
URI:	http://eprints.utem.edu.my/id/eprint/30186
Statistic Details:	View Download Statistic

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