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An 8 mev electron beam modified in:Zno thin films for co gas sensing towards low concentration

Ani, A and Poornesh, P and Antony, A and Nagaraja, KK and Rao, A and Hegde, G and Kolesnikov, E and Shchetinin, IV and Kulkarni, SD and Petwal, VC and Verma, VP and Dwivedi, J (2021) An 8 mev electron beam modified in:Zno thin films for co gas sensing towards low concentration. In: Nanomaterials, 11 (11).

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Official URL: https://doi.org/10.3390/nano11113151


In the present investigation, electron beam-influenced modifications on the CO gas sensing properties of indium doped ZnO (IZO) thin films were reported. Dose rates of 5, 10, and 15 kGy were irradiated to the IZO nano films while maintaining the In doping concentration to be 15 wt. The wurtzite structure of IZO films is observed from XRD studies post electron beam irradiation, confirming structural stability, even in the intense radiation environment. The surface morphological studies by SEM confirms the granular structure with distinct and sharp grain boundaries for 5 kGy and 10 kGy irradiated films whereas the IZO film irradiated at 15 kGy shows the deterioration of defined grains. The presence of defects viz oxygen vacancies, interstitials are recorded from room temperature photoluminescence (RTPL) studies. The CO gas sensing estimations were executed at an optimized operating temperature of 300�C for 1 ppm, 2 ppm, 3 ppm, 4 ppm, and 5 ppm. The 10 kGy treated IZO film displayed an enhanced sensor response of 2.61 towards low concentrations of 1 ppm and 4.35 towards 5 ppm. The enhancement in sensor response after irradiation is assigned to the growth in oxygen vacancies and well-defined grain boundaries since the former and latter act as vital adsorption locations for the CO gas. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type: Journal Article
Publication: Nanomaterials
Publisher: MDPI
Additional Information: The copyright for this article belongs to Authors
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 21 Dec 2021 05:56
Last Modified: 21 Dec 2021 05:56
URI: http://eprints.iisc.ac.in/id/eprint/70716

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