Real-time detection by properties of tin dioxide for formaldehyde gas sensor

Zaki, Mohd; Hashim, U.; Arshad, M. K. Md; Fathil, M. F. M.; Ruslinda, A. Rahim; Ayub, R. M.; Gopinath, Subash C. B.; Voon, C. H.; Foo, K. L.; Adzhri, R.; Azman, A. H.

doi:10.1109/rsm.2015.7355001

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…The oxygen molecules gently diffuse and take electrons from the grain boundary of the film and are converted into oxygen anions. This interface mechanism leads to the loss of electrons causes a depletion region or space charge region across the grain boundary of the sensing layer which leads to a change in the resistance at grain boundaries [5]. This resistance further changes upon exposure to target gas, depending upon the type of semiconductor material and type of target gas used.…”

Section: Introductionmentioning

confidence: 99%

Real-time detection of 1-butanol VOCin an indigenously developed Gas chamber

Bhat

Kumar

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In this paper, we discuss the sensing studies of 1-butanol volatile organic compound (VOC) in an indigenously developed gas chamber. Designing of the portable gas chamber is discussed with the integration of thin-film ZnO sensor on an Inter-digitated electrodefabricated on a flexible Teflon substrate. Exposure of 1-butanol VOC inside the chamber causes a change in the resistance of the ZnO thin film. This change in the resistance is converted to voltage with a Wheatstone bridge network and an instrumentation amplifier circuit designed using precision components.The sensitivity of the sensor for 50 ppm and 100 ppm of 1-butanol is tested at room temperature (27°C) and the results are compared with our early studies using Keithley instruments.

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Section: Introductionmentioning

confidence: 99%