Grain boundary mapping in polycrystalline graphene.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 21280616.
- Also identified by DOI 10.1021/nn1033423.
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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.
Medical subject headings
- Crystallization
- Graphite
- Materials Testing
- Nanostructures