Atomic structure of a CeO2 grain boundary: The role of oxygen vacancies

Hajime Hojo, Teruyasu Mizoguchi, Hiromichi Ohta, Scott Findlay, Naoya Shibata, Takahisa Yamamoto, Yuichi Ikuhara

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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)I 5 CeO2 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.
Original languageEnglish
Pages (from-to)4668 - 4672
Number of pages5
JournalNano Letters
Issue number11
Publication statusPublished - 2010
Externally publishedYes

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