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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
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
#Submitted by
Subject:
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