Topology of disordered 3D graphene networks
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 m...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/141823 |
| _version_ | 1811679844026548224 |
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| author | Martin, Jacob W. de Tomas, Carla Suarez-Martinez, Irene Kraft, Markus Marks, Nigel A. |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Martin, Jacob W. de Tomas, Carla Suarez-Martinez, Irene Kraft, Markus Marks, Nigel A. |
| author_sort | Martin, Jacob W. |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T03:15:36Z |
| format | Journal Article |
| id | ntu-10356/141823 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:15:36Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1418232023-12-29T06:46:23Z Topology of disordered 3D graphene networks Martin, Jacob W. de Tomas, Carla Suarez-Martinez, Irene Kraft, Markus Marks, Nigel A. School of Chemical and Biomedical Engineering Cambridge Centre for Advanced Research and Education in Singapore Engineering::Chemical engineering Disclinations & Dislocations Grain Boundaries 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. NRF (Natl Research Foundation, S’pore) Published version 2020-06-11T02:51:29Z 2020-06-11T02:51:29Z 2019 Journal Article 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 0031-9007 https://hdl.handle.net/10356/141823 10.1103/PhysRevLett.123.116105 31573266 2-s2.0-85072737578 11 123 en Physical Review Letters © 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. application/pdf |
| spellingShingle | Engineering::Chemical engineering Disclinations & Dislocations Grain Boundaries Martin, Jacob W. de Tomas, Carla Suarez-Martinez, Irene Kraft, Markus Marks, Nigel A. Topology of disordered 3D graphene networks |
| title | Topology of disordered 3D graphene networks |
| title_full | Topology of disordered 3D graphene networks |
| title_fullStr | Topology of disordered 3D graphene networks |
| title_full_unstemmed | Topology of disordered 3D graphene networks |
| title_short | Topology of disordered 3D graphene networks |
| title_sort | topology of disordered 3d graphene networks |
| topic | Engineering::Chemical engineering Disclinations & Dislocations Grain Boundaries |
| url | https://hdl.handle.net/10356/141823 |
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