NDLI: Percolation Conduction of Carbon Nanocomposites

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Percolation Conduction of Carbon Nanocomposites

Content Provider	MDPI
Author	Bocharov, Grigorii Eletskii, Alexander
Copyright Year	2020
Description	Carbon nanocomposites present a new class of nanomaterials in which conducting carbon nanoparticles are a small additive to a non-conducting matrix. A typical example of such composites is a polymer matrix doped with carbon nanotubes (CNT). Due to a high aspect ratio of CNTs, inserting rather low quantity of nanotubes (on the level of 0.01%) results in the percolation transition, which causes the enhancement in the conductivity of the material by 10–12 orders of magnitude. Another type of nanocarbon composite is a film produced as a result of reduction of graphene oxide (GO). Such a film is consisted of GO fragments whose conductivity is determined by the degree of reduction. A distinctive peculiarity of both types of nanocomposites relates to the dependence of the conductivity of those materials on the applied voltage. Such a behavior is caused by a non-ideal contact between neighboring carbon nanoparticles incorporated into the composite. The resistance of such a contact depends sharply on the electrical field strength and therefore on the distance between neighboring nanoparticles. Experiments demonstrating non-linear, non-Ohmic behavior of both above-mentioned types of carbon nanocomposites are considered in the present article. There has been a model description presented of such a behavior based on the quasi-classical approach to the problem of electron tunneling through the barrier formed by the electric field. The calculation results correspond qualitatively to the available experimental data.
Starting Page	7634
e-ISSN	14220067
DOI	10.3390/ijms21207634
Journal	International Journal of Molecular Sciences
Issue Number	20
Volume Number	21
Language	English
Publisher	MDPI
Publisher Date	2020-10-15
Access Restriction	Open
Subject Keyword	International Journal of Molecular Sciences Polymer Nanocomposites Carbon Nanotubes Graphene Oxide Percolation Conduction
Content Type	Text
Resource Type	Article

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