Direct Atom-Resolved Imaging of Oxides and Their Grain Boundaries

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Science  31 Oct 2003:
Vol. 302, Issue 5646, pp. 846-849
DOI: 10.1126/science.1089785

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Using high-resolution transmission electron microscopy, we obtained structure images of strontium titanate (SrTiO3) with a clearly resolved oxygen sublattice along different crystallographic directions in the bulklattice and for a Σ3 tilt grain boundary. Comparison with image simulations showed that the grain boundary contains oxygen vacancies. Measurements of atom displacements near the grain boundary revealed close correspondence with theoretical calculations.

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