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Plasma Enhanced Chemical Vapour Deposited Carbon Nanotubes for Field Emission Applications

Published online by Cambridge University Press:  15 March 2011

K. B. K. Teo ,
G. Pirio ,
S.B. Lee ,
M. Chhowalla ,
P. Legagneux ,
Y. Nedellec ,
D.G. Hasko ,
H. Ahmed ,
D. Pribat  and
G.A.J. Amaratunga
...Show all authors
K. B. K. Teo
Affiliation:
Engineering Department, Cambridge University, Trumpington St, Cambridge CB2 1PZ, UK
G. Pirio
Affiliation:
Thales Research and Technology, Domaine de Corbeville, 91404 Orsay Cedex, France
S.B. Lee
Affiliation:
Microelectronics Research Centre, Cavendish Laboratory, Cambridge University, Madingley Road, Cambridge CB3 0HE, UK
M. Chhowalla
Affiliation:
Engineering Department, Cambridge University, Trumpington St, Cambridge CB2 1PZ, UK
P. Legagneux
Affiliation:
Thales Research and Technology, Domaine de Corbeville, 91404 Orsay Cedex, France
Y. Nedellec
Affiliation:
Thales Research and Technology, Domaine de Corbeville, 91404 Orsay Cedex, France
D.G. Hasko
Affiliation:
Microelectronics Research Centre, Cavendish Laboratory, Cambridge University, Madingley Road, Cambridge CB3 0HE, UK
H. Ahmed
Affiliation:
Microelectronics Research Centre, Cavendish Laboratory, Cambridge University, Madingley Road, Cambridge CB3 0HE, UK
D. Pribat
Affiliation:
Thales Research and Technology, Domaine de Corbeville, 91404 Orsay Cedex, France
G.A.J. Amaratunga
Affiliation:
Engineering Department, Cambridge University, Trumpington St, Cambridge CB2 1PZ, UK
W.I. Milne
Affiliation:
Engineering Department, Cambridge University, Trumpington St, Cambridge CB2 1PZ, UK
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Abstract

Plasma Enhanced Chemical Vapour Deposition is an extremely versatile technique for directly growing multiwalled carbon nanotubes onto various substrates. We will demonstrate the deposition of vertically aligned nanotube arrays, sparsely or densely populated nanotube forests, and precisely patterned arrays of nanotubes. The high-aspect ratio nanotubes (~50 nm in diameter and 5 microns long) produced are metallic in nature and direct contact electrical measurements reveal that each nanotube has a current carrying capacity of 107-108 A/cm2, making them excellent candidates as field emission sources. We examined the field emission characteristics of dense nanotube forests as well as sparse nanotube forests and found that the sparse forests had significantly lower turn-on fields and higher emission currents. This is due to a reduction in the field enhancement of the nanotubes due to electric field shielding from adjacent nanotubes in the dense nanotube arrays. We thus fabricated a uniform array of single nanotubes to attempt to overcome these issues and will present the field emission characteristics of this.

Type
Article
Information
MRS Online Proceedings Library (OPL) , Volume 706: Symposium Z – Making Functional Materials with Nanotubes , 2001 , Z5.9.1
Copyright
Copyright © Materials Research Society 2002

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