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International Journal of Electrochemistry
Volume 2019, Article ID 6478708, 6 pages
https://doi.org/10.1155/2019/6478708
Research Article

Electrical Conductivity of Films Formed by Few-Layer Graphene Structures Obtained by Plasma-Assisted Electrochemical Exfoliation of Graphite

Institute of Problems of Chemical Physics of Russian Academy of Sciences, Academician Semenov avenue 1, Chernogolovka, Moscow 142432, Russia

Correspondence should be addressed to Vladimir P. Vasiliev; ur.liam@veilisavpv

Received 30 November 2018; Revised 12 February 2019; Accepted 11 March 2019; Published 28 April 2019

Academic Editor: Gerd-Uwe Flechsig

Copyright © 2019 Vladimir P. Vasiliev et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Current-voltage characteristics of few-layer graphene structures (FLGS) obtained by plasma-assisted electrochemical exfoliation of graphite in Na2SO4 solution were measured. FLGS are shown to possess electronic conductivity, which indicates the predominant functionalization of the edges of graphene planes and the preservation of the structure of basal planes in obtained nanostructures as in the source graphite. The effect of humidity on the conductivity of FLGS films was studied. The resistance of films was found to increase with an increase in the relative humidity of the environment due to the shielding of FLGS flakes by a film of water. The effect of different solvents on the current-voltage characteristics of FLGS was analyzed. The conductivity of films significantly decreased in vapors of polar protic solvents, while there was a minor effect of nonpolar aprotic solvents on the conductivity of FLGS films.