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The dependence of the graphene electrical resistance on mechanical deformation

Journal of physics. Conference series, 2020-11, Vol.1677 (1), p.12125 [Peer Reviewed Journal]

Published under licence by IOP Publishing Ltd ;2020. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1742-6588 ;EISSN: 1742-6596 ;DOI: 10.1088/1742-6596/1677/1/012125

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  • Title:
    The dependence of the graphene electrical resistance on mechanical deformation
  • Author: Boyko, E V ; Kostogrud, I A ; Smovzh, D V
  • Subjects: Coating ; Deformation resistance ; Electrical resistance ; Graphene ; Heterogeneous structure ; Monolayers ; Multilayers ; Polymer matrix composites ; Radius of curvature ; Tensile strain
  • Is Part Of: Journal of physics. Conference series, 2020-11, Vol.1677 (1), p.12125
  • Description: 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.
  • Publisher: Bristol: IOP Publishing
  • Language: English
  • Identifier: ISSN: 1742-6588
    EISSN: 1742-6596
    DOI: 10.1088/1742-6596/1677/1/012125
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    IOP Publishing (Open access)
    AUTh Library subscriptions: ProQuest Central
    IOPscience (Open Access)
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