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Field Emission Response from Multiwall Carbon Nanotubes Grown on Different Metallic Substrates

Published online by Cambridge University Press:  31 January 2011

Indranil Lahiri ,
Raghunandan Seelaboyina  and
Wonbong Choi
Indranil Lahiri
Affiliation:
indranil78@yahoo.com, Florida International University, Mechanical & Materials Enigineering, Miami, Florida, United States
Raghunandan Seelaboyina
Affiliation:
rseel001@fiu.edu, Florida International University, Mechanical & Materials Enigineering, Miami, Florida, United States
Wonbong Choi
Affiliation:
choiw@fiu.edu, Florida International University, Mechanical and Materials Engineering, EC3465, 10555 West Flagler street, miami, Florida, 33174, United States
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Abstract

Carbon nanotubes (CNT) have seen a wide variety of applications, spread well beyond the semiconductor industries - especially in field emission related devices. For its widest possible application, it has become very much important to grow CNTs on a variety of metallic substrates and understand their field emission response. In the present study, multiwall CNTs (MWCNT), grown on pure metallic substrates like Cu, Al and W, were subjected to field emission tests under DC and AC bias. Choice of diffusion barrier layer and catalyst was also varied, to verify their effects on the emission response. Field emission behaviors from all such structures were compared with MWCNTs grown on Si. It was found that the MWCNTs grown on pure Cu substrate showed excellent field electron emission response, in terms of low turn-on field, high emission current, long time stability and very high field enhancement factor.

Keywords

field emissionnanostructurechemical vapor deposition (CVD) (deposition)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1204: Symposium K – Nanotubes and Related Nanostructures-2009 , 2009 , 1204-K18-21
Copyright
Copyright © Materials Research Society 2010

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