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Original Paper
Improved field emission properties of MgO-nanoparticle-doped carbon nanotube films and their application in miniature vacuum gauges
Article first published online: 9 NOV 2012
DOI: 10.1002/pssa.201228415
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Su, J., Guo, D.-Z., Xing, Y.-J. and Zhang, G.-M. (2013), Improved field emission properties of MgO-nanoparticle-doped carbon nanotube films and their application in miniature vacuum gauges. Phys. Status Solidi A, 210: 349–355. doi: 10.1002/pssa.201228415
Publication History
- Issue published online: 15 FEB 2013
- Article first published online: 9 NOV 2012
- Manuscript Accepted: 19 OCT 2012
- Manuscript Revised: 14 SEP 2012
- Manuscript Received: 22 JUN 2012
Funded by
- National Natural Science Foundation of China. Grant Number: 60971002
- Abstract
- Article
- References
- Cited By
Keywords:
- carbon nanotubes;
- field emission;
- ionization vacuum gauge;
- MgO nanoparticles
Abstract
Composite films of carbon nanotubes (CNTs) and MgO nanoparticles are fabricated on metal substrates as field emitters by a simple mechanical rubbing method. The field emission properties of the CNT films could be dramatically improved by mixing an optimum proportion (∼7 wt%) of MgO nanoparticles. It lowers the turn-on field to 1.3 V µm−1 and the threshold field to 2 V µm−1, and also increases the field emission stability and uniformity. Such CNTs–MgO films are applied as cathode in ionization vacuum gauges. The gauges, with the advantages of small size and low power consumption, exhibit good measurement linearity in vacuum pressure range from 8 × 10−6 to 2 × 10−2 Pa, and a sensitivity of 0.2 Pa−1.