Table of Content

Open Access iconOpen Access

ARTICLE

The Colossal Piezoresistive Effect in Nickel Nanostrand Polymer Composites and a Quantum Tunneling Model

Oliver K. Johnson1, Calvin J. Gardner1, David T. Fullwood1, Brent L.Adams1, Nathan Hansen2, George Hansen2

Brigham Young University, Provo, UT, U.S.A.
Conductive Composites Company, LLC., Midway, UT, U.S.A.

Computers, Materials & Continua 2010, 15(2), 87-112. https://doi.org/10.3970/cmc.2010.015.087

Abstract

A novel nickel nanostrand-silicone composite material at an optimized 15 vol% filler concentration demonstrates a dramatic piezoresistive effect with a negative gauge factor (ratio of percent change in resistivity to strain). The composite volume resistivity decreases in excess of three orders of magnitude at a 60% strain. The piezoresistivity does decrease slightly as a function of cycles, but not significantly as a function of time. The material's resistivity is also temperature dependent, once again with a negative dependence.
The evidence indicates that nickel strands are physically separated by matrix material even at high volume fractions, and points to a charge transport mechanism that causes a large change in conductivity for a small relative change in the distance between filler particles. Combined with the temperature dependence data, this suggests that conduction in this composite material may be dominated by quantum tunneling effects. Based upon a statistical model of junction character distribution, a quantum tunneling percolation model is applied that accurately reflects the mechanical and thermal trends.

Keywords


Cite This Article

APA Style
Johnson, O.K., Gardner, C.J., Fullwood, D.T., L.Adams, B., Hansen, N. et al. (2010). The colossal piezoresistive effect in nickel nanostrand polymer composites and a quantum tunneling model. Computers, Materials & Continua, 15(2), 87-112. https://doi.org/10.3970/cmc.2010.015.087
Vancouver Style
Johnson OK, Gardner CJ, Fullwood DT, L.Adams B, Hansen N, Hansen G. The colossal piezoresistive effect in nickel nanostrand polymer composites and a quantum tunneling model. Comput Mater Contin. 2010;15(2):87-112 https://doi.org/10.3970/cmc.2010.015.087
IEEE Style
O.K. Johnson, C.J. Gardner, D.T. Fullwood, B. L.Adams, N. Hansen, and G. Hansen "The Colossal Piezoresistive Effect in Nickel Nanostrand Polymer Composites and a Quantum Tunneling Model," Comput. Mater. Contin., vol. 15, no. 2, pp. 87-112. 2010. https://doi.org/10.3970/cmc.2010.015.087



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 2143

    View

  • 1747

    Download

  • 0

    Like

Share Link