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Improvement Field Emission of Carbon Nanotube/Polyurethane Foam Composites by Cellular Wall Field Enhancement Structure
Tao Chen,Baoqing Zeng * #
National Key Laboratory of Science and Technology on Vacuum Electronics, School of Physical Electronics, University of electronic science and technology of china, Chengdu, 610054
*Correspondence author
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Funding: none
Opened online: 1 March 2012
Accepted by: none
Citation: Tao Chen,Baoqing Zeng.Improvement Field Emission of Carbon Nanotube/Polyurethane Foam Composites by Cellular Wall Field Enhancement Structure[OL]. [ 1 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4467046
 
 
In this paper, the electron field-emission characteristics of carbon-nanotube-polymer composites produced by static casting were reported. An emission current density of 1 mA/cm2 was obtained at an operating electric field of 1.4 V/μm with a turn-on field of 0.6 V/μm at 0.01 mA/cm2 by using 2% volume fraction of CNT in polymer composites. Such low field is resulted from a high field enhancement factor of 2.34×104 due to the combined effects of the high intrinsic aspect ratio of carbon nanotubes and the typical cellular structure of polymer composites.
Keywords:electron physics; field emission; carbon nanotubes; polymer
 
 
 

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