TY - JOUR

T1 - The dependence of the graphene electrical resistance on mechanical deformation

AU - Boyko, E. V.

AU - Kostogrud, I. A.

AU - Smovzh, D. V.

N1 - Funding Information: Experiments related to the graphene CVD synthesis, subsequent Raman and optical analysis of the samples were financially supported by IT SB RAS (АААА-А19-119061490008-3), experimental studies of the piezoresistive properties of the obtained composites were financially supported by RFBR / Russian Foundation for Basic Research (Project No. 19-42-543013). Publisher Copyright: © 2020 Institute of Physics Publishing. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/12/3

Y1 - 2020/12/3

N2 - In this work, the piezoresistive properties of polymer-graphene composites were investigated. The electrical resistance of these samples ranged from 693 to 1277 Ohm/sq for single-layer graphene coating, and from 477 to 1096 Ohm/sq for multilayer coating. It was shown that with a tensile strain of 4%, the maximum gauge factor was 100. For bending with a radius of curvature of 70 mm, which corresponds to a stretch of 0.75%, the maximum gauge factor was 34. It is shown that samples with a single-layer graphene coating are more resistant to deformation processes their electrical resistance changes less than in samples with a multilayer graphene coating. Such a phenomenon can be associated with an increased concentration of defects and imperfections in graphene structures, which, in the case of a multilayer coating, leads to lower strength of the entire structure and much more destructive consequences in tension. A multilayer coating can have a heterogeneous structure: individual multilayer islands can be connected by single-layer sections. The gap between the latter leads to a significant drop in the electrical resistance of the entire sample.

AB - In this work, the piezoresistive properties of polymer-graphene composites were investigated. The electrical resistance of these samples ranged from 693 to 1277 Ohm/sq for single-layer graphene coating, and from 477 to 1096 Ohm/sq for multilayer coating. It was shown that with a tensile strain of 4%, the maximum gauge factor was 100. For bending with a radius of curvature of 70 mm, which corresponds to a stretch of 0.75%, the maximum gauge factor was 34. It is shown that samples with a single-layer graphene coating are more resistant to deformation processes their electrical resistance changes less than in samples with a multilayer graphene coating. Such a phenomenon can be associated with an increased concentration of defects and imperfections in graphene structures, which, in the case of a multilayer coating, leads to lower strength of the entire structure and much more destructive consequences in tension. A multilayer coating can have a heterogeneous structure: individual multilayer islands can be connected by single-layer sections. The gap between the latter leads to a significant drop in the electrical resistance of the entire sample.

UR - http://www.scopus.com/inward/record.url?scp=85097337714&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/1677/1/012125

DO - 10.1088/1742-6596/1677/1/012125

M3 - Conference article

AN - SCOPUS:85097337714

VL - 1677

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012125

T2 - 36th Siberian Thermophysical Seminar, STS 2020

Y2 - 5 October 2020 through 7 October 2020

ER -