期刊
APPLIED PHYSICS LETTERS
卷 99, 期 26, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3671987
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资金
- NANOTEC [NN-B-22-DI2-20-51-09]
- U.S. Department of Energy, Division of Materials Sciences and Engineering
- Royal Golden Jubilee Ph.D. Program [PHD/0180/2552]
The local structure of MgxZn1-xO nanocrystals is studied using synchrotron x-ray absorption near edge structures (XANES) over the full range of composition, from x = 0 to 1. Mg and Zn K-edges XANES measurements allow us to selectively study the local environments around Mg and Zn atoms in these nanocrystalline samples. Our results indicate that, for MgO-ZnO alloys, Zn is highly miscible in the rocksalt domain (i.e., up to similar to 50 at. %) while the miscibility of Mg in the wurtzite domain is much less but is still substantial (i.e., up to similar to 20 at. %). The simulated XANES spectra, based on first principles methods, are consistent with the observed spectra, confirming our finding. Because it is short-ranged and element-specific, the technique is useful for local structure and crystal phase determination of nanostructures, quantum dots, and mixed-phase alloys in general. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3671987]
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