Stable field emission from tetrapod-like ZnO nanostructures

Li, Q. H.; Wan, Q.; Chen, Y. J.; Wang, T. H.; Jia, H. B.; Yu, D. P.
July 2004
Applied Physics Letters;7/26/2004, Vol. 85 Issue 4, p636
Academic Journal
Stable field emission is realized from well-separated tetrapod-like ZnO nanostructures with high purity. The ZnO nanostructures are painted on a highly doped silicon substrate covered by a Au layer with a thickness of 300 nm. An emission current density of 18 mA/cm2 is obtained and degradation was not observed over a three day period. The fluctuations of the emission current are less than 2%. These experimental results indicate that tetrapod-like ZnO nanostructures are promising materials as cold cathodes for mass production.


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