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Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances

CNTs and CNT-MgO, CNT-MgO-Ag, and CNT-MgO-Ag-BaO nanocomposites were grown on alloy substrates using an electrophoretic deposition method and their field emission (FE) and hydrogen sensing performances were investigated. The obtained samples were characterized by SEM, TEM, XRD, Raman, and XPS charac...

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Autores principales: Liu, Xingzhen, Qian, Weijin, Chen, Yawei, Dong, Mingliang, Yu, Taxue, Huang, Weijun, Dong, Changkun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10005578/
https://www.ncbi.nlm.nih.gov/pubmed/36903763
http://dx.doi.org/10.3390/nano13050885
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author Liu, Xingzhen
Qian, Weijin
Chen, Yawei
Dong, Mingliang
Yu, Taxue
Huang, Weijun
Dong, Changkun
author_facet Liu, Xingzhen
Qian, Weijin
Chen, Yawei
Dong, Mingliang
Yu, Taxue
Huang, Weijun
Dong, Changkun
author_sort Liu, Xingzhen
collection PubMed
description CNTs and CNT-MgO, CNT-MgO-Ag, and CNT-MgO-Ag-BaO nanocomposites were grown on alloy substrates using an electrophoretic deposition method and their field emission (FE) and hydrogen sensing performances were investigated. The obtained samples were characterized by SEM, TEM, XRD, Raman, and XPS characterizations. The CNT-MgO-Ag-BaO nanocomposites showed the best FE performance with turn-on and threshold fields of 3.32 and 5.92 V.μm(−1), respectively. The enhanced FE performances are mainly attributed to the reductions of the work function, and the enhancement of the thermal conductivity and emission sites. The current fluctuation of CNT-MgO-Ag-BaO nanocomposites was only 2.4% after a 12 h test at the pressure of 6.0 × 10(−6) Pa. In addition, for the hydrogen sensing performances, the CNT-MgO-Ag-BaO sample showed the best increase in amplitude of the emission current among all the samples, with the mean I(N) increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA.
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spelling pubmed-100055782023-03-11 Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances Liu, Xingzhen Qian, Weijin Chen, Yawei Dong, Mingliang Yu, Taxue Huang, Weijun Dong, Changkun Nanomaterials (Basel) Article CNTs and CNT-MgO, CNT-MgO-Ag, and CNT-MgO-Ag-BaO nanocomposites were grown on alloy substrates using an electrophoretic deposition method and their field emission (FE) and hydrogen sensing performances were investigated. The obtained samples were characterized by SEM, TEM, XRD, Raman, and XPS characterizations. The CNT-MgO-Ag-BaO nanocomposites showed the best FE performance with turn-on and threshold fields of 3.32 and 5.92 V.μm(−1), respectively. The enhanced FE performances are mainly attributed to the reductions of the work function, and the enhancement of the thermal conductivity and emission sites. The current fluctuation of CNT-MgO-Ag-BaO nanocomposites was only 2.4% after a 12 h test at the pressure of 6.0 × 10(−6) Pa. In addition, for the hydrogen sensing performances, the CNT-MgO-Ag-BaO sample showed the best increase in amplitude of the emission current among all the samples, with the mean I(N) increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA. MDPI 2023-02-27 /pmc/articles/PMC10005578/ /pubmed/36903763 http://dx.doi.org/10.3390/nano13050885 Text en © 2023 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 Article
Liu, Xingzhen
Qian, Weijin
Chen, Yawei
Dong, Mingliang
Yu, Taxue
Huang, Weijun
Dong, Changkun
Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title_full Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title_fullStr Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title_full_unstemmed Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title_short Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
title_sort construction of cnt-mgo-ag-bao nanocomposite with enhanced field emission and hydrogen sensing performances
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10005578/
https://www.ncbi.nlm.nih.gov/pubmed/36903763
http://dx.doi.org/10.3390/nano13050885
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