Cart (Loading....) | Create Account
Close category search window

The influence of electric field and emission current on the configuration of nanotubes in carbon nanotubes layers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

9 Author(s)
Kiselev, N.A. ; Inst. of Crystallogr., Acad. of Sci., Moscow ; Musatov, A.L. ; Hutchison, J.L. ; Zhigalina, O.M.
more authors

Carbon nanotube (NT) layers grown by CVD on Ni foil demonstrated low voltage characteristics of field electron emission: the value of the field amplification coefficient beta was in the range 1000-4000. The influence of electric field (Eav), emission current (IFE ) and exposure time on the configuration of conical-layer carbon nanotubes grown by CVD on the edge of a Ni foil has been investigated. TEM profile imaging revealed a significant concentration of NTs close to the edge surface, whereas on the NTs layers' outer surfaces single, non-oriented NTs with open ends free of catalytic particles, were observed. After sufficient electric field application many NTs become oriented towards the anode, but one or two of them were always a few microns more extended. In-situ SEM investigation showed that below Eav = 3.2 - 3.9 V/mum, emission was achieved at the expense of originally existing free NTs ends. Configuration changes began at the higher applied fields. On the observed foil edge length (14.6 - 17.8 mum) and the edge thickness 200 mum one or two NTs extended towards the anode and probably become main emitters. On further increasing the field to Eav= 5.7 - 8 V/mum and at IFE=2times10-5 A these tubes disappeared (or essentially shortened). At Eav = 8 V/mum and higher, and at an exposure time of up to 40 min, several tens of extended NTs appeared with one or two extended significantly beyond the others. This NT configuration pattern is probably connected with electrostatic screening between the NTs. It is suggested that in the range of Eav and IFE that was investigated, a limited number of NTs were emitting and these nanotubes were constantly changing as Eav, IFE and exposure time increase

Published in:

Vacuum Nanoelectronics Conference, 2005. IVNC 2005. Technical Digest of the 18th International

Date of Conference:

10-14 July 2005

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.