Microstructure change of ZnO nanowire induced by energetic x-ray radiation and its effect on the field emission properties

The changes in the microstructure of ZnO nanowire were studied after exposure to different radiation doses of energetic x-rays. Detailed structural, composition and optical analyses were carried out. It was found that the surface composition changed and defects were formed in the irradiated ZnO nano...

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Bibliographic Details
Published in:Nanotechnology 2013-07, Vol.24 (27), p.275703-1-9
Main Authors: Zhao, C X, Li, Y F, Chen, Y C, Wu, J Q, Wang, B, Yi, F T, Deng, S Z, Xu, N S, Chen, Jun
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Defects
Exact sciences and technology
Field emission
Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
Materials science
Microstructure
Nanocomposites
Nanocrystalline materials
Nanomaterials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanowires
Physics
Quantum wires
Radiation effects on specific materials
Structure of solids and liquids
crystallography
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
X-rays
Zinc oxide
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Summary:The changes in the microstructure of ZnO nanowire were studied after exposure to different radiation doses of energetic x-rays. Detailed structural, composition and optical analyses were carried out. It was found that the surface composition changed and defects were formed in the irradiated ZnO nanowires. The structural change of ZnO nanowires after thermal treatment was also studied and similar defects were observed. It is proposed that phonon-induced localized heating is the main reason for the observed changes in microstructure. Finally, the field emission properties of ZnO nanowires before and after x-ray radiation were studied. It was found that the increase of work function and change in morphology induced by the irradiation were the reasons for the observed change in field emission properties.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/24/27/275703