Atomic structure of a CeO2 grain boundary: the role of oxygen vacancies.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20977250.
- Also identified by DOI 10.1021/nl1029336.
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Abstract
Determining both cation and oxygen sublattices of grain boundaries is essential to understand the properties of oxides. Here, with scanning transmission electron microscopy, electron energy-loss spectroscopy, and first-principles calculations, both the Ce and oxygen sublattices of a (210)Σ5 CeO(2) grain boundary were determined. Oxygen vacancies are shown to play a crucial role in the stable grain boundary structure. This finding paves the way for a comprehensive understanding of grain boundaries through the atomic scale determination of atom and defect locations.
Medical subject headings
- Cerium
- Models, Chemical
- Models, Molecular
- Oxygen