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Field Emission Device Made from Multiwalled Carbon Nanotube Sheet

Published online by Cambridge University Press:  30 March 2012

Hai H. Van ,
Mei Zhang ,
Ben Wang  and
Chuck Zhang
Hai H. Van
Affiliation:
Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering; High-Performance Materials Institute, Florida State University, 2525 Pottsdamer Street, Tallahassee, FL 32310, U.S.A.
Mei Zhang
Affiliation:
Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering; High-Performance Materials Institute, Florida State University, 2525 Pottsdamer Street, Tallahassee, FL 32310, U.S.A.
Ben Wang
Affiliation:
Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering; High-Performance Materials Institute, Florida State University, 2525 Pottsdamer Street, Tallahassee, FL 32310, U.S.A.
Chuck Zhang
Affiliation:
Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering; High-Performance Materials Institute, Florida State University, 2525 Pottsdamer Street, Tallahassee, FL 32310, U.S.A.
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Abstract

A new type of cathode for electron field emission (FE) was fabricated. The cathode was made from ultra-thin multiwalled carbon nanotube (CNT) sheets. These sheets were drawn directly from a CNT forest, stacked layer-by-layer together and densified by isopropyl alcohol. CNT emitters were formed by utilizing laser beam to cut the sheet. The FE performance of the proposed devices has been enhanced dramatically. The threshold field for electron emission (at which the emission current is 10 mA/cm2) was 0.88 V/μm. The current density of 36 A/cm2 was achieved at the electric field of 2 V/μm. The enhanced performance is the result of the thin, uniformly distributed and aligned array of the CNT emitters.

Keywords

field emissionnanostructureC
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1407: Symposium AA – Carbon Nanotubes, Graphene and Related Nanostructures , 2012 , mrsf11-1407-aa15-15
Copyright
Copyright © Materials Research Society 2012

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