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Materials 2014, 7(4), 2501-2521; doi:10.3390/ma7042501

Tunneling Conductivity and Piezoresistivity of Composites Containing Randomly Dispersed Conductive Nano-Platelets

1 Advanced Composite Materials Engineering Group, Department of Mechanical Engineering, University of Alberta, Edmonton T6G 2G8, AB, Canada 2 Department of Chemical and Petroleum Engineering, University of Calgary, Calgary T2N 1N4, AB, Canada
* Author to whom correspondence should be addressed.
Received: 31 October 2013 / Revised: 2 December 2013 / Accepted: 18 March 2014 / Published: 28 March 2014
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles 2013)
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In this study, a three-dimensional continuum percolation model was developed based on a Monte Carlo simulation approach to investigate the percolation behavior of an electrically insulating matrix reinforced with conductive nano-platelet fillers. The conductivity behavior of composites rendered conductive by randomly dispersed conductive platelets was modeled by developing a three-dimensional finite element resistor network. Parameters related to the percolation threshold and a power-low describing the conductivity behavior were determined. The piezoresistivity behavior of conductive composites was studied employing a reoriented resistor network emulating a conductive composite subjected to mechanical strain. The effects of the governing parameters, i.e., electron tunneling distance, conductive particle aspect ratio and size effects on conductivity behavior were examined.
Keywords: nanocomposites; electrical properties; modeling; piezoresistivity effect nanocomposites; electrical properties; modeling; piezoresistivity effect
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Oskouyi, A.B.; Sundararaj, U.; Mertiny, P. Tunneling Conductivity and Piezoresistivity of Composites Containing Randomly Dispersed Conductive Nano-Platelets. Materials 2014, 7, 2501-2521.

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