Non-Linearity of Electrical Conductivity for Aligned Multi-Walled Carbon Nanotube Nanocomposites: Numerical Estimation of Significance of Influencing Factors

Stepan V. Lomov, Iskander S. Akhatov, Jeonyoon Lee, Brian L. Wardle, Sergey G. Abaimov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The non-linearity of the electrical conductivity with applied voltage is numerically simulated for aligned multi-walled carbon nanotube (A-CNT) nanocomposites. The geometry of the reinforcement is generated based on the morphology of the A-CNT forest experimentally observed by 3D transmission electron microscope computed tomography. The polymer matrix is assumed to be electrically insulative; therefore, DC electrical conductivity is estimated by the current-voltage characteristic of the conducting CNT morphology At different values of voltage, the influence of electrical fields and magnetic fields leads to conformational changes in the nanotube network being the significant factor of the conductivity change for soft materials. The change of the tunneling resistance with the applied voltage are taken into account. The influences of the mentioned factors are comparatively analyzed. Combination of the effects provides the cumulative non-linear dependence for the nanocomposite electrical conductivity. The non-linear effects appear only for very high applied voltage, 1 V/µm and higher; the conformational change effect is felt only if the matrix on the nanocomposite is very soft, such as in foams.

Original languageEnglish
Title of host publicationNANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings
PublisherIEEE Computer Society
Pages378-381
Number of pages4
ISBN (Electronic)9781665441568
DOIs
Publication statusPublished - 28 Jul 2021
Event21st IEEE International Conference on Nanotechnology, NANO 2021 - Virtual, Montreal, Canada
Duration: 28 Jul 202130 Jul 2021

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
Volume2021-July
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380

Conference

Conference21st IEEE International Conference on Nanotechnology, NANO 2021
Country/TerritoryCanada
CityVirtual, Montreal
Period28/07/2130/07/21

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