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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Published in:	Nanomaterials (Basel, Switzerland) Vol. 13; no. 5; p. 885
Main Authors:	Liu, Xingzhen, Qian, Weijin, Chen, Yawei, Dong, Mingliang, Yu, Taxue, Huang, Weijun, Dong, Changkun
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 27.02.2023 MDPI
Subjects:	Barium compounds Barium oxides Chemical vapor deposition CNT-MgO-Ag-BaO nanocomposite Composite materials Diffraction Electric properties Electrodes Electrophoretic deposition Emission analysis Emissions Ethanol Field emission Heat conductivity Hydrogen hydrogen sensing Investigations Magnesium oxide Nanocomposites Nanoparticles Nanotubes Optical properties Raman spectroscopy Scanning electron microscopy Silver Spectrum analysis stability Stainless steel Substrates tensile test Thermal conductivity Work functions X ray photoelectron spectroscopy X-ray spectroscopy X-rays China United States > US Japan electrophoretic deposition tensile test CNT-MgO-Ag-BaO nanocomposite hydrogen sensing field emission stability
ISSN:	2079-4991, 2079-4991
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Abstract	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 IN increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA.
AbstractList	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 , 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 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 increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA. 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[sup.−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[sup.−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[sub.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. 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 IN increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA. 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 IN increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA.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 IN increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA.
Audience	Academic
Author	Qian, Weijin Chen, Yawei Huang, Weijun Yu, Taxue Liu, Xingzhen Dong, Mingliang Dong, Changkun
AuthorAffiliation	Wenzhou Key Lab of Micro-Nano Optoelectronic Devices, Wenzhou University, Wenzhou 325035, China
AuthorAffiliation_xml	– name: Wenzhou Key Lab of Micro-Nano Optoelectronic Devices, Wenzhou University, Wenzhou 325035, China
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Cites_doi	10.1166/jnn.2011.3963 10.1109/LED.2018.2873727 10.1016/j.sse.2011.08.005 10.1039/C7RA09985A 10.1002/aelm.202000838 10.1016/j.compositesa.2011.03.024 10.1038/s41467-018-03721-y 10.1021/am2016969 10.1016/j.carbon.2017.09.032 10.1016/j.vacuum.2022.111663 10.1063/1.4997239 10.1016/j.diamond.2014.10.001 10.1039/C7RA02264F 10.1016/j.carbon.2020.08.081 10.1088/1361-6528/aa7c5a 10.1007/s11661-014-2294-1 10.1039/C9TC01858A 10.1016/j.apsusc.2006.05.012 10.1039/C5NR08661B 10.1016/j.diamond.2022.108970 10.3390/nano9101450 10.1063/1.1591246 10.1109/TPS.2021.3134376 10.1186/1556-276X-9-236 10.1016/j.carbon.2006.10.014 10.1016/j.carbon.2006.06.021 10.1016/j.vacuum.2022.110900 10.1016/j.carbon.2008.01.026 10.1016/j.apsusc.2010.10.153 10.1039/C5RA19182C 10.1016/j.surfcoat.2022.128213 10.1007/s40820-016-0082-8 10.3390/nano12030575 10.1021/jp9020068 10.1063/1.122907
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Snippet	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...
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SubjectTerms	Barium compounds Barium oxides Chemical vapor deposition CNT-MgO-Ag-BaO nanocomposite Composite materials Diffraction Electric properties Electrodes Electrophoretic deposition Emission analysis Emissions Ethanol Field emission Heat conductivity Hydrogen hydrogen sensing Investigations Magnesium oxide Nanocomposites Nanoparticles Nanotubes Optical properties Raman spectroscopy Scanning electron microscopy Silver Spectrum analysis stability Stainless steel Substrates tensile test Thermal conductivity Work functions X ray photoelectron spectroscopy X-ray spectroscopy X-rays
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Title	Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances
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