Field Emission and Emission-Stimulated Desorption of ZnO Nanomaterials

The vapor inside the quartz vial would be brought out finally. [...]the closer the substrate gets to the export of the quartz vial, the more products of ZnO nanostructures will be obtained. [...]the gas released from the ZnO surface may go through several cycles of adsorption and desorption before b...

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Published inApplied sciences Vol. 8; no. 3; p. 382
Main Authors Li, Nannan, Li, Xiaozhao, Zeng, Baoqing
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2018
Subjects
Adsorption
Arrays
Desorption
emission-stimulated desorption
Field emission
Gases
Laboratories
Nanomaterials
Nanoparticles
Nanotechnology
Nanowires
Photovoltaic cells
Physical vapor deposition
Quartz
Scanning electron microscopy
Silicon substrates
Substrates
Surface chemistry
Vacuum
Vapors
Zinc oxide
Zinc oxides
ZnO nanomaterials
China
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Abstract The vapor inside the quartz vial would be brought out finally. [...]the closer the substrate gets to the export of the quartz vial, the more products of ZnO nanostructures will be obtained. [...]the gas released from the ZnO surface may go through several cycles of adsorption and desorption before being pumped out totally. In our test, the vacuum ion pump was working all the time. [...]the gas released from the ZnO nanomaterials surface will be discharged finally after several desorption and adsorption cycles. [...]a water-assisted physical vapor deposition method was proposed and used to prepare various ZnO nanostructures simultaneously on a silicon substrate with one experimental run.
AbstractList Compared with other field-emission nanomaterials, 1D ZnO nanomaterials have some unique properties—such as high melting point, high thermal and chemical stability, and ambient insensitivity—which means they have promising potential applications as field emitters in harsh environments. This work proposed a water-assisted physical vapor deposition method to prepare various ZnO nanostructures simultaneously on a silicon substrate with one experimental run. Field emission characteristics of the as-grown ZnO nanomaterials were measured and analyzed. Emission-stimulated desorption was proposed and investigated. The gas released under the emission-stimulated desorption effect was measured in the way of monitoring the variation of the pressure. The results show that the slight variation of the pressure has almost no effects on the field-emissions, and field emission properties can be improved with the gases released from the surface of ZnO under the emission-stimulated-desorption effect. Finally, a low turn-on voltage in the range of 0.5–0.9 V/μm was achieved and a stable emission current was obtained. The ambient insensitivity of ZnO nanomaterials make them possible to be used as field emission cathodes in harsh environments with fluctuating pressure.
The vapor inside the quartz vial would be brought out finally. [...]the closer the substrate gets to the export of the quartz vial, the more products of ZnO nanostructures will be obtained. [...]the gas released from the ZnO surface may go through several cycles of adsorption and desorption before being pumped out totally. In our test, the vacuum ion pump was working all the time. [...]the gas released from the ZnO nanomaterials surface will be discharged finally after several desorption and adsorption cycles. [...]a water-assisted physical vapor deposition method was proposed and used to prepare various ZnO nanostructures simultaneously on a silicon substrate with one experimental run.
Author Li, Xiaozhao
Zeng, Baoqing
Li, Nannan
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CitedBy_id crossref_primary_10_1039_D1NJ02248B
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10.1116/1.1315200
10.1088/1361-6528/aa96e6
10.1103/PhysRevB.57.12151
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Snippet The vapor inside the quartz vial would be brought out finally. [...]the closer the substrate gets to the export of the quartz vial, the more products of ZnO...
Compared with other field-emission nanomaterials, 1D ZnO nanomaterials have some unique properties—such as high melting point, high thermal and chemical...
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StartPage 382
SubjectTerms Adsorption
Arrays
Desorption
emission-stimulated desorption
Field emission
Gases
Laboratories
Nanomaterials
Nanoparticles
Nanotechnology
Nanowires
Photovoltaic cells
Physical vapor deposition
Quartz
Scanning electron microscopy
Silicon substrates
Substrates
Surface chemistry
Vacuum
Vapors
Zinc oxide
Zinc oxides
ZnO nanomaterials
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Title Field Emission and Emission-Stimulated Desorption of ZnO Nanomaterials
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