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Published in: Journal of Materials Science: Materials in Electronics 11/2024

01-04-2024

Zinc oxide thin films deposited by sol–gel spin-coating technique for propane and carbon monoxide sensing applications

Authors: Stephani Monserrat Rojano Chávez, Lizeth Martínez Ayala, Tangirala Venkata Krishna Karthik, Arturo Maldonado, Heberto Gómez-Pozos

Published in: Journal of Materials Science: Materials in Electronics | Issue 11/2024

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Abstract

Undoped zinc oxide (ZnO) films were deposited on soda-lime glass substrates by utilizing sol–gel spin coating method. Zinc acetate dihydrate, 2-metoxietanol and monoethanolamine were used as precursor, solvent and surfactant, respectively. XRD analysis confirms the ZnO wurtzite structure with (002) as the preferential orientation. SEM studies show the formation of porous and spherical grains with a grain size distribution from 20 to 60 nm. Raman spectroscopy confirms the crystallization and structural disorder of all ZnO sensors. Sensing responses of all ZnO films were obtained for both carbon monoxide (CO) and propane (C3H8) gases at different gas concentrations and operating temperatures. The highest sensing responses of ~ 35 and ~ 1400 were obtained for films deposited at 4000 rpm and exposed a CO and C3H8, respectively. The behavior of sensing responses is explained in detail based on the structural and morphological properties and the improvement in the structural properties and sensing responses is explained based on the spin coater rotation speed.

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Metadata
Title
Zinc oxide thin films deposited by sol–gel spin-coating technique for propane and carbon monoxide sensing applications
Authors
Stephani Monserrat Rojano Chávez
Lizeth Martínez Ayala
Tangirala Venkata Krishna Karthik
Arturo Maldonado
Heberto Gómez-Pozos
Publication date
01-04-2024
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 11/2024
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-024-12502-x

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