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    Topology of disordered 3D graphene networks

    90790.pdf (4.220Mb)
    Access Status
    Open access
    Authors
    Martin, Jacob
    Tomas Andres, Carla de
    Suarez-Martinez, Irene
    Kraft, M.
    Marks, Nigel
    Date
    2019
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Martin, J.W. and De Tomas, C. and Suarez-Martinez, I. and Kraft, M. and Marks, N.A. 2019. Topology of disordered 3D graphene networks. Physical Review Letters. 123 (11): ARTN 116105.
    Source Title
    Physical Review Letters
    DOI
    10.1103/PhysRevLett.123.116105
    Additional URLs
    https://www.repository.cam.ac.uk/handle/1810/302042
    ISSN
    0031-9007
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT140100191
    Remarks

    Copyright © 2019 American Physical Society

    URI
    http://hdl.handle.net/20.500.11937/90966
    Collection
    • Curtin Research Publications
    Abstract

    Disordered carbons comprise graphene fragments assembled into three-dimensional networks. It has long been debated whether these networks contain positive curvature, as seen in fullerenes, negative curvature, as proposed for the schwarzite structures, or zero curvature, as in ribbons. We present a mesh-based approach to analyze the topology of a set of nanoporous and glassy carbon models that accurately reproduce experimental properties. Although all three topological elements are present, negatively curved structures dominate. At the atomic level, analysis of local environments shows that sp- A nd sp3-bonded atoms are associated with line defects and screw dislocations that resolve topological complexities such as termination of free edges and stacking of low curvature regions into ribbons. These results provide insight into the synthesis of porous carbon materials, glassy carbon and the graphitizability of carbon materials.

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