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ACS Nano. 2011 Mar 22;5(3):2142-6. doi: 10.1021/nn1033423. Epub 2011 Jan 31.

Grain boundary mapping in polycrystalline graphene.

Author information

1
Department of Physics and Center of Integrated Nanomechanical Systems, University of California at Berkeley, Berkeley, California 94720, United States.

Abstract

We report direct mapping of the grains and grain boundaries (GBs) of large-area monolayer polycrystalline graphene sheets, at large (several micrometer) and single-atom length scales. Global grain and GB mapping is performed using electron diffraction in scanning transmission electron microscopy (STEM) or using dark-field imaging in conventional TEM. Additionally, we employ aberration-corrected TEM to extract direct images of the local atomic arrangements of graphene GBs, which reveal the alternating pentagon-heptagon structure along high-angle GBs. Our findings provide a readily adaptable tool for graphene GB studies.

PMID:
21280616
DOI:
10.1021/nn1033423
[Indexed for MEDLINE]

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