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Using Graphene Liquid Cell Transmission Electron Microscopy to Study in Situ Nanocrystal Etching
Published on: May 17, 2018
Amorphous graphene: a constituent part of low density amorphous carbon
Bishal Bhattarai1, Parthapratim Biswas, Raymond Atta-Fynn
1Department of Physics and Astronomy, Condensed Matter and Surface Science Program (CMSS), Ohio University, Athens, Ohio 45701, USA.
Abstract:
In this paper, we provide evidence that low density nano-porous amorphous carbon (a-C) consists of interconnected regions of amorphous graphene (a-G). We include experimental information in producing models, while retaining the power and accuracy of ab initio methods with no biasing assumptions. Our models are highly disordered with predominant sp2 bonding and ring connectivity mainly of sizes 5-8. The structural, dynamical and electronic signatures of our 3-D amorphous graphene are similar to those of monolayer amorphous graphene. We predict an extended x-ray absorption fine structure (EXAFS) signature of amorphous graphene. Electronic density of states calculations for 3-D amorphous graphene reveal similarity to monolayer amorphous graphene and the system is non conducting.
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