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Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature

Recently, as air pollution and particulate matter worsen, the importance of a platform that can monitor the air environment is emerging. Especially, among air pollutants, nitrogen dioxide (NO(2)) is a toxic gas that can not only generate secondary particulate matter, but can also derive numerous tox...

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Autores principales: Kwon, Seokhun, Lee, Seokwon, Kim, Joouk, Park, Chulmin, Jung, Hosung, Kim, Hyungchul, Kim, Chulsoo, Kang, Hyunil
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779247/
https://www.ncbi.nlm.nih.gov/pubmed/35062587
http://dx.doi.org/10.3390/s22020626
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author Kwon, Seokhun
Lee, Seokwon
Kim, Joouk
Park, Chulmin
Jung, Hosung
Kim, Hyungchul
Kim, Chulsoo
Kang, Hyunil
author_facet Kwon, Seokhun
Lee, Seokwon
Kim, Joouk
Park, Chulmin
Jung, Hosung
Kim, Hyungchul
Kim, Chulsoo
Kang, Hyunil
author_sort Kwon, Seokhun
collection PubMed
description Recently, as air pollution and particulate matter worsen, the importance of a platform that can monitor the air environment is emerging. Especially, among air pollutants, nitrogen dioxide (NO(2)) is a toxic gas that can not only generate secondary particulate matter, but can also derive numerous toxic gases. To detect such NO(2) gas at low concentration, we fabricated a GNWs/NiO-WO(3)/GNWs heterostructure-based gas sensor using microwave plasma-enhanced chemical vapor deposition (MPECVD) and sputter, and we confirmed the NO(2) detection characteristics between 10 and 50 ppm at room temperature. The morphology and carbon lattice characteristics of the sensing layer were investigated using field emission scanning electron microscopy (FESEM) and Raman spectroscopy. In the gas detection measurement, the resistance negative change according to the NO(2) gas concentration was recorded. Moreover, it reacted even at low concentrations such as 5–7 ppm, and showed excellent recovery characteristics of more than 98%. Furthermore, it also showed a change in which the reactivity decreased with respect to humidity of 33% and 66%.
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spelling pubmed-87792472022-01-22 Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature Kwon, Seokhun Lee, Seokwon Kim, Joouk Park, Chulmin Jung, Hosung Kim, Hyungchul Kim, Chulsoo Kang, Hyunil Sensors (Basel) Communication Recently, as air pollution and particulate matter worsen, the importance of a platform that can monitor the air environment is emerging. Especially, among air pollutants, nitrogen dioxide (NO(2)) is a toxic gas that can not only generate secondary particulate matter, but can also derive numerous toxic gases. To detect such NO(2) gas at low concentration, we fabricated a GNWs/NiO-WO(3)/GNWs heterostructure-based gas sensor using microwave plasma-enhanced chemical vapor deposition (MPECVD) and sputter, and we confirmed the NO(2) detection characteristics between 10 and 50 ppm at room temperature. The morphology and carbon lattice characteristics of the sensing layer were investigated using field emission scanning electron microscopy (FESEM) and Raman spectroscopy. In the gas detection measurement, the resistance negative change according to the NO(2) gas concentration was recorded. Moreover, it reacted even at low concentrations such as 5–7 ppm, and showed excellent recovery characteristics of more than 98%. Furthermore, it also showed a change in which the reactivity decreased with respect to humidity of 33% and 66%. MDPI 2022-01-14 /pmc/articles/PMC8779247/ /pubmed/35062587 http://dx.doi.org/10.3390/s22020626 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Kwon, Seokhun
Lee, Seokwon
Kim, Joouk
Park, Chulmin
Jung, Hosung
Kim, Hyungchul
Kim, Chulsoo
Kang, Hyunil
Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title_full Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title_fullStr Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title_full_unstemmed Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title_short Effect of GNWs/NiO-WO(3)/GNWs Heterostructure for NO(2) Gas Sensing at Room Temperature
title_sort effect of gnws/nio-wo(3)/gnws heterostructure for no(2) gas sensing at room temperature
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779247/
https://www.ncbi.nlm.nih.gov/pubmed/35062587
http://dx.doi.org/10.3390/s22020626
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