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Field Emission Properties of Large Area Carbon Nanotube Cathodes in DC and Pulse Modes

Published online by Cambridge University Press:  01 February 2011

Qingliang Liao ,
Yue Zhang ,
Liansheng Xia ,
Junjie Qi ,
Yunhua Huang ,
Zi Qin ,
Ya Yang  and
Zhanjun Gao
Qingliang Liao
Affiliation:
qlliao@sohu.com, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, 30 Xueyuan Road, Haidian District, Beijing, 100083, China, People's Republic of
Yue Zhang
Affiliation:
yuezhang@ustb.edu.cn, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
Liansheng Xia
Affiliation:
lsh-xia@yahoo.com.cn, Chinese Academy of Engineering Physics, Institute of Fluid Physics, Mianyang, 621900, China, People's Republic of
Junjie Qi
Affiliation:
junjieqi@mater.ustb.edu.cn, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
Yunhua Huang
Affiliation:
huangyh@mater.ustb.edu.cn, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
Zi Qin
Affiliation:
qinzi83717@163.com, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
Ya Yang
Affiliation:
challengeon@yahoo.com.cn, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
Zhanjun Gao
Affiliation:
gzj@cae.cn, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, Beijing, 100083, China, People's Republic of
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Abstract

A large area carbon nanotube cathode was fabricated by use of a screen printing method. The emission properties of the cathode were investigated in both direct current and pulse mode experiments. In the direct current mode, the cathode has high field enhancement factor and high emission current density. In the double-pulse mode, the emission current density can approach 267 A/cm2 at an applied electric field of 15.4 V/um. Steady intense electron beams were obtained from the cathode. The results proved that the emission mechanism of CNTs at pulse electric field is plasma-induced field emission. The carbon nanotube cathode is suitable for not only field emission display applications but also high-power microwave device applications.

Keywords

nanoscalescreen printingfield emission
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1081: Symposium P – Carbon Nanotubes and Related Low-Dimensional Materials , 2008 , 1081-P15-07
Copyright
Copyright © Materials Research Society 2008

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