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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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%. |
format | Online Article Text |
id | pubmed-8779247 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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