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A three-dimensional model of electrical percolation thresholds in carbon nanotube-based composites

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3 Author(s)
Lu, Weibang ; Department of Mechanical Engineering and Center for Composite Materials, University of Delaware, Newark, Delaware 19716, USA ; Chou, Tsu-Wei ; Thostenson, Erik T.

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A three-dimensional modeling approach is developed to simulate the electrical percolation thresholds in carbon nanotube-based composites, wherein the effects of intertube Van der Waals interactions and electrical tunneling are taken into consideration. Numerical studies using the Monte Carlo method show that these two factors play significant roles when the aspect ratio of the constituent carbon nanotubes is low. For high aspect ratios, the effects of these two factors are negligible. The influence of carbon nanotube waviness on electrical percolation thresholds has also been studied.

Published in:

Applied Physics Letters  (Volume:96 ,  Issue: 22 )