Field Emission Properties of ZnO Single Crystal Microtubes

Jiping Cheng; Yunjin Zhang; Ruyan Guo

doi:10.1063/1.3075813

Field Emission Properties of ZnO Single Crystal Microtubes

Jiping Cheng, Yunjin Zhang, Ruyan Guo

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Field emission properties of ZnO single-crystal microtubes were investigated in this work. The turn-on voltages for the as-grown and postannealed ZnO microtube samples were 5.6 and 6.4 V/μm, respectively. The emission current density was 11 mA/ cm² at an applied field of 20 V/μm for the as grown ZnO microtube and 12.5 mA/ cm² at an applied field of 13 V/μm for the postannealed ZnO microtube. Due to the relatively large tip area (in comparison with ZnO nanomaterials) of the ZnO microtubes, the intrinsic field emission enhancement factor Β of the ZnO microtube was comparatively low (estimated to be around 6.5). However, the experimental Β values were quite high (418 for the as-grown ZnO microtube and 1466 for the postannealed ZnO microtube), indicating strong field emission characteristics of the ZnO microtubes.

Original language	English (US)
Article number	034313
Journal	Journal of Applied Physics
Volume	105
Issue number	3
DOIs	https://doi.org/10.1063/1.3075813
State	Published - 2009

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.3075813

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title = "Field Emission Properties of ZnO Single Crystal Microtubes",

abstract = "Field emission properties of ZnO single-crystal microtubes were investigated in this work. The turn-on voltages for the as-grown and postannealed ZnO microtube samples were 5.6 and 6.4 V/μm, respectively. The emission current density was 11 mA/ cm2 at an applied field of 20 V/μm for the as grown ZnO microtube and 12.5 mA/ cm2 at an applied field of 13 V/μm for the postannealed ZnO microtube. Due to the relatively large tip area (in comparison with ZnO nanomaterials) of the ZnO microtubes, the intrinsic field emission enhancement factor Β of the ZnO microtube was comparatively low (estimated to be around 6.5). However, the experimental Β values were quite high (418 for the as-grown ZnO microtube and 1466 for the postannealed ZnO microtube), indicating strong field emission characteristics of the ZnO microtubes.",

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T1 - Field Emission Properties of ZnO Single Crystal Microtubes

AU - Cheng, Jiping

AU - Zhang, Yunjin

AU - Guo, Ruyan

PY - 2009

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N2 - Field emission properties of ZnO single-crystal microtubes were investigated in this work. The turn-on voltages for the as-grown and postannealed ZnO microtube samples were 5.6 and 6.4 V/μm, respectively. The emission current density was 11 mA/ cm2 at an applied field of 20 V/μm for the as grown ZnO microtube and 12.5 mA/ cm2 at an applied field of 13 V/μm for the postannealed ZnO microtube. Due to the relatively large tip area (in comparison with ZnO nanomaterials) of the ZnO microtubes, the intrinsic field emission enhancement factor Β of the ZnO microtube was comparatively low (estimated to be around 6.5). However, the experimental Β values were quite high (418 for the as-grown ZnO microtube and 1466 for the postannealed ZnO microtube), indicating strong field emission characteristics of the ZnO microtubes.

AB - Field emission properties of ZnO single-crystal microtubes were investigated in this work. The turn-on voltages for the as-grown and postannealed ZnO microtube samples were 5.6 and 6.4 V/μm, respectively. The emission current density was 11 mA/ cm2 at an applied field of 20 V/μm for the as grown ZnO microtube and 12.5 mA/ cm2 at an applied field of 13 V/μm for the postannealed ZnO microtube. Due to the relatively large tip area (in comparison with ZnO nanomaterials) of the ZnO microtubes, the intrinsic field emission enhancement factor Β of the ZnO microtube was comparatively low (estimated to be around 6.5). However, the experimental Β values were quite high (418 for the as-grown ZnO microtube and 1466 for the postannealed ZnO microtube), indicating strong field emission characteristics of the ZnO microtubes.

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Field Emission Properties of ZnO Single Crystal Microtubes

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