Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 112, Issue 51, Pages 15609-15618Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1520402112
Keywords
nanocarbon; modeling; allotropes; penta-graphene; Haeckelite
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Funding
- Deutsche Forschungsgemeinschaft [PF 790/1-1]
- European Research Council [X-MuSiC-616783]
- Heidelberg Graduate School for Mathematical and Computational Methods in the Sciences
- EPSRC [EP/F009917/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F009917/1] Funding Source: researchfish
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In recent years, a plethora of theoretical carbon allotropes have been proposed, none of which has been experimentally isolated. We discuss here criteria that should be met for a new phase to be potentially experimentally viable. We take as examples Haeckelites, 2D networks of sp(2)-carbon-containing pentagons and heptagons, and penta-graphene, consisting of a layer of pentagons constructed from a mixture of sp(2)- and sp(3)-coordinated carbon atoms. In 2D projection appearing as the Cairo pattern, penta-graphene is elegant and aesthetically pleasing. However, we dispute the author's claims of its potential stability and experimental relevance.
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