Piezoresistance of flexible tunneling-percolation networks

Isaac Taylor-Harrod; Alain Nogaret

doi:10.1103/PhysRevB.96.024205

Piezoresistance of flexible tunneling-percolation networks

Isaac Taylor-Harrod, Alain Nogaret

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Abstract

We model changes in the conductivity of flexible composite films stressed by bending. By treating stress as a perturbation of the effective medium conductivity, we obtain an expression of the piezoresistance as a function of four material parameters. The model correctly predicts resistance spikes and their recovery under the action of viscoelastic forces, in good agreement with experimental observations over stress cycles. The theory may be used to design composite materials for high-sensitivity touch sensors.

Original language	English
Article number	024205
Journal	Physical Review B
Volume	96
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.96.024205
Publication status	Published - 20 Jul 2017

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10.1103/PhysRevB.96.024205

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©2017 American Physical Society. The following article appeared in Taylor-Harrod, I. Nogaret, A. (2017) Piezoresistance of flexible tunneling-percolation networks. Phys. Rev. B 96(2) and may be found at doi.org/10.1103/PhysRevB.96.024205.
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title = "Piezoresistance of flexible tunneling-percolation networks",

abstract = "We model changes in the conductivity of flexible composite films stressed by bending. By treating stress as a perturbation of the effective medium conductivity, we obtain an expression of the piezoresistance as a function of four material parameters. The model correctly predicts resistance spikes and their recovery under the action of viscoelastic forces, in good agreement with experimental observations over stress cycles. The theory may be used to design composite materials for high-sensitivity touch sensors.",

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AB - We model changes in the conductivity of flexible composite films stressed by bending. By treating stress as a perturbation of the effective medium conductivity, we obtain an expression of the piezoresistance as a function of four material parameters. The model correctly predicts resistance spikes and their recovery under the action of viscoelastic forces, in good agreement with experimental observations over stress cycles. The theory may be used to design composite materials for high-sensitivity touch sensors.

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Piezoresistance of flexible tunneling-percolation networks

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