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Stable Electron Field Emission from CeO2 Nanowires by Hydrothermal Method |
| FU Xing-Qiu;FENG Ping;WANG Chong;WANG Tai-Hong |
| Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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FU Xing-Qiu, FENG Ping, WANG Chong et al 2007 Chin. Phys. Lett. 24 2423-2425 |
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Abstract CeO2 nanowires are successful synthesized by hydrothermal method and their field emission (FE) properties are investigated. The turn-on electric field is 5.8V/μm at an emitter--anode spacing of 700μm. The FE current is stable and the current fluctuations are less than 3% over 5h. All the plotted Fowler--Nordheim curves yield straight lines, which are in agreement with the Fowler--Nordheim theory. The relationship between the field enhancement factor β and the emitter--anode spacing d follows a universal equation. Our results
imply that the CeO2 nanowires are promising materials for fabricating FE cathodes.
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| Keywords:
85.45.Fd
61.46.+w
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Received: 17 April 2007
Published: 25 July 2007
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