Pentagonal puckering in a sheet of amorphous graphene

Y. Li, F. Inam, Avishek Kumar, Michael Thorpe, D. A. Drabold

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Ordered graphene has been extensively studied. In this paper, we undertake a density functional study of topologically disordered analogs of graphene, in the form of a random network, consisting predominantly of hexagonal rings, but also including pentagons and heptagons. After some preliminaries with crystalline material, we relax various random network models and find that the presence of carbon pentagons induce local curvature, thus breaking the initial planar symmetry, in some analogy with the case of fullerenes. Using density functional theory to calculate the total energy, we find that while the planar state is locally stable, there is a puckered state that has lower energy. The scale of the puckering is consistent with that expected with local maxima and minima associated with pentagons surrounded by larger rings, forming local "buckyball domes".

Original languageEnglish (US)
Pages (from-to)2082-2086
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume248
Issue number9
DOIs
StatePublished - Sep 2011

Keywords

  • Amorphous graphene
  • Density functional theory
  • Fullerenes
  • Puckering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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