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Chitosan coating on quartz crystal microbalance gas sensor for isopropyl alcohol and acetone detection

Lukman Hekiem, Nurul Liyana and Md Ralib @ Md Raghib, Aliza 'Aini and Mat Harttar @ Mohd Hatta, Maziati Akmal and Ahmad, Farah and Ab. Rahim, Rosminazuin and Za'bah, Nor Farahidah and Sugandi, Gandi (2022) Chitosan coating on quartz crystal microbalance gas sensor for isopropyl alcohol and acetone detection. International Journal of Integrated Engineering, 14 (3). pp. 241-244. ISSN 2229-838X E-ISSN 2600-7916

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The development of acoustic wave sensors was driven by the presence of modern technology. Quartzcrystal microbalance (QCM) has excellent sensing capabilitiesand has wide range ofapplications. Selection of sensing layer is crucial to ensure the performance of the QCM sensor for volatile organic compound (VOC) detection. Hence, the objective of this paper is to compare the performance of chitosan coated QCM sensor for different analyte gas: isopropyl alcohol (IPA). Finite element simulation was implemented usingCOMSOL Multiphysics to study the resonance frequency shift before and after sensing. Simulation results shows IPA detection shows a higher resonance frequency shift of 62.5 Hzcompared to acetone due to higher molar mass. Experimental work is conducted to validate the simulation results where IPA analyte gas yields in 84.8 Hz which is higher than acetone analyte gas at 41.8 Hz. The functional groups for both sensing layer and analyte gas also affects the gas detection performance. IPA analyte gas possessed hydroxyl groups that favors to hydrogen bond formation with chitosan sensing layer. Thus, the QCM sensor with chitosan as the sensing layer has the potential for VOC sensing of different molar mass and functional groups.

Item Type: Article (Journal)
Uncontrolled Keywords: chitosansensing layer, QCMsensor, resonance frequency shift, sensitivity
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Biotechnology Engineering
Kulliyyah of Engineering > Department of Science
Depositing User: Aliza Aini Md Ralib
Date Deposited: 05 Jan 2023 10:20
Last Modified: 05 Jan 2023 10:20
URI: http://irep.iium.edu.my/id/eprint/102700

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