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Title: Topology of disordered 3D graphene networks
Authors: Martin, Jacob W.
de Tomas, Carla
Suarez-Martinez, Irene
Kraft, Markus
Marks, Nigel A.
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Martin, J. W., de Tomas, C., Suarez-Martinez, I., Kraft, M., & Marks, N. A. (2019). Topology of disordered 3D graphene networks. Physical Review Letters, 123(11), 116105-. doi:10.1103/PhysRevLett.123.116105
Journal: Physical Review Letters 
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- and 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.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.123.116105
Schools: School of Chemical and Biomedical Engineering 
Organisations: Cambridge Centre for Advanced Research and Education in Singapore 
Rights: © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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