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

Determinant role of tunneling resistance in electrical conductivity of polymer composites reinforced by well dispersed carbon nanotubes

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 $31
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

3 Author(s)
Yu, Y. ; Department of Mechanical Engineering, University of Houston, Houston, Texas 77204, USA ; Song, G. ; Sun, L.

Your organization might have access to this article on the publisher's site. To check, click on this link: 

Three-dimensional Monte Carlo simulation is used to investigate the electrical conductivity of nanocomposites composing of conducting nanofillers and insulating polymer matrix. When nanofillers concentrations low and they are well dispersed in the insulating matrix, electron tunneling resistance between the nanofiller junctions is found to play the dominant role in electron transport. In addition to the tunneling resistance, there is also the resistance of the conducting nanotube segments. These two types of resistance form the resistor network for electron conductance. For composites with well dispersion, individual tubes are separated by polymer molecules and the resulted tunneling resistance can be several orders larger in magnitude than the resistance of individual tubes. Considering the two types of resistors are always linked in an alternating order in the resistor network, the much larger tunneling resistance plays the determinant role in the electrical resistance of nanocomposites. When the contribution of the intrinsic tube resistance is ignored, the number of resistors in conduction paths can be reduced by more than a half and as a result, the computation efficiency is significantly improved. With improved computation efficiency, three-dimensional cubic representative volume elements with high nanotube aspect ratios up to 1000 can be simulated. Simulation results are in good agreement with the critical behaviors predicted by the classical percolation theory, as well as the reported experimental measurements.

Published in:

Journal of Applied Physics  (Volume:108 ,  Issue: 8 )

Date of Publication:

Oct 2010

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.