Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability

Nanostructured ZnO has been widely investigated as a gas sensing material. Antimony is an important dopant for ZnO that catalyses its surface reactivity and thus strengthens its gas sensing capability. However, there are not enough studies on the gas sensing of antimony-doped ZnO single wires. We fa...

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Detalles Bibliográficos
Autores principales: Chhetri, Tej Poudel, Kerr, Lei, Masmali, Nada, Jaeger, Herbert, Eid, Khalid F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2022
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8728165/
https://www.ncbi.nlm.nih.gov/pubmed/35070344
http://dx.doi.org/10.1098/rsos.211243
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author Chhetri, Tej Poudel
Kerr, Lei
Masmali, Nada
Jaeger, Herbert
Eid, Khalid F.
author_facet Chhetri, Tej Poudel
Kerr, Lei
Masmali, Nada
Jaeger, Herbert
Eid, Khalid F.
author_sort Chhetri, Tej Poudel
collection PubMed
description Nanostructured ZnO has been widely investigated as a gas sensing material. Antimony is an important dopant for ZnO that catalyses its surface reactivity and thus strengthens its gas sensing capability. However, there are not enough studies on the gas sensing of antimony-doped ZnO single wires. We fabricated and characterized ZnO/ZnO:Sb core–shell micro-wires and demonstrated that individual wires are sensitive to oxygen gas flow. Temperature and light illumination strongly affect the oxygen gas sensitivity and stability of these individual wires. It was found that these micro- and nano-wire oxygen sensors at 200°C give the highest response to oxygen, yet a vanishingly small effect of light and temperature variations. The underlying physics and the interplay between these effects are discussed in terms of surface-adsorbed oxygen, oxygen vacancies and hydrogen doping.
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spelling pubmed-87281652022-01-21 Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability Chhetri, Tej Poudel Kerr, Lei Masmali, Nada Jaeger, Herbert Eid, Khalid F. R Soc Open Sci Chemistry Nanostructured ZnO has been widely investigated as a gas sensing material. Antimony is an important dopant for ZnO that catalyses its surface reactivity and thus strengthens its gas sensing capability. However, there are not enough studies on the gas sensing of antimony-doped ZnO single wires. We fabricated and characterized ZnO/ZnO:Sb core–shell micro-wires and demonstrated that individual wires are sensitive to oxygen gas flow. Temperature and light illumination strongly affect the oxygen gas sensitivity and stability of these individual wires. It was found that these micro- and nano-wire oxygen sensors at 200°C give the highest response to oxygen, yet a vanishingly small effect of light and temperature variations. The underlying physics and the interplay between these effects are discussed in terms of surface-adsorbed oxygen, oxygen vacancies and hydrogen doping. The Royal Society 2022-01-05 /pmc/articles/PMC8728165/ /pubmed/35070344 http://dx.doi.org/10.1098/rsos.211243 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Chhetri, Tej Poudel
Kerr, Lei
Masmali, Nada
Jaeger, Herbert
Eid, Khalid F.
Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title_full Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title_fullStr Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title_full_unstemmed Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title_short Oxygen sensing with individual ZnO:Sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
title_sort oxygen sensing with individual zno:sb micro-wires: effects of temperature and light exposure on the sensitivity and stability
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8728165/
https://www.ncbi.nlm.nih.gov/pubmed/35070344
http://dx.doi.org/10.1098/rsos.211243
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