Composite electrode of carbon nanotubes and vitreous carbon for electron field emission
Matsubara, EY, Rosolen, JM and Silva, SRP (2008) Composite electrode of carbon nanotubes and vitreous carbon for electron field emission JOURNAL OF APPLIED PHYSICS, 104 (5). ? - ?. ISSN 0021-8979
Available under License : See the attached licence file.
Official URL: http://dx.doi.org/10.1063/1.2974090
In this work, the electron field emission behaviour of electrodes formed by carbon nanotubes (CNTs) grown onto monolithic vitreous carbon (VCarbon) substrates with microcavities is presented. Scanning electron microscopy was used to characterize the microstructure of the films. Tungsten probes, stainless steel sphere, and phosphor electrodes were employed in the electron field emission study. The CNT/VCarbon composite represents a route to inexpensive excellent large area electron emission cathodes with fields as low as 2.1 V mu m(-1). In preliminary lifetime tests for a period of about 24 h at an emission current of about 4 mA cm(-2), there is an onset degradation of the emission current of about 28%, which then stabilizes. Electron emission images of the composites show the cavity of the samples act as separate emission sites and predominantly control the emission process. The emission of CNTs/VCarbon was found to be stable for several hours.
Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The following article appeared in Applied Physics Letters, 104 (5) 054303 and may be found at http://dx.doi.org/10.1063/1.2974090 E. Y. Matsubara, J. M. Rosolen, Appl. Phys.Lett. 104, 054303 (2008)
|Uncontrolled Keywords:||Science & Technology, Physical Sciences, Physics, Applied, Physics|
|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre|
|Deposited By:||Mr Adam Field|
|Deposited On:||26 Nov 2012 09:59|
|Last Modified:||11 May 2013 14:53|
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