Actions for ATOMIC SCALE CHARACTERIZATION OF OXYGEN VACANCY DYNAMICS BY IN SITU REDUCTION AND ANALYTICAL ATOMIC RESOLUTION STEM [electronic resource].

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ATOMIC SCALE CHARACTERIZATION OF OXYGEN VACANCY DYNAMICS BY IN SITU REDUCTION AND ANALYTICAL ATOMIC RESOLUTION STEM [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 2002.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
2 pages : digital, PDF file
Additional Creators
Brookhaven National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In this study, we present nano-scale investigations of point defect dynamics in perovskite oxides by correlated atomic resolution high angle annular dark field imaging (HAADF) and electron energy loss spectroscopy (EELS). The point defect dynamics and interactions during in-situ reduction in the microscope column are analyzed. In particular, oxygen vacancy creation, diffusion and clustering are studied, as oxygen vacancies comprise the majority of the point defects present in these perovskite oxide systems [1]. The results have been acquired using the JEOL2010F, a STEM/TEM, equipped with a 200 keV field emission gun, a high angle annular dark field detector and a post column Gatan imaging filter (GIF). The combination of the Z-contrast and EELS techniques [2] allows us to obtain direct images (spatial resolution of 2 Å) of the atomic structure and to correlate this information with the atomically resolved EELS information (3s acquisition time, 1.2 eV energy resolution). In-situ heating of the material is performed in a Gatan double tilt holder with a temperature range of 300 K-773 K at an oxygen partial pressure of P{sub O₂} = 5 * 10⁻⁸ Pa.
Report Numbers
E 1.99:bnl--69649
bnl--69649
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Note
Published through SciTech Connect.
08/04/2002.
"bnl--69649"
"KC0201010"
MICROSCOPY AND MICROANALYSIS MEETING, QUEBEC CITY (CA), 08/04/2002--08/08/2002.
BROWNING,N.D.; ZHU,Y.; KLIE,R.F.
Funding Information
AC02-98CH10886
MA015MACA
View MARC record | catkey: 14448888