Orientation-dependent x-ray absorption fine structure of ZnO nanorods
SCIE
SCOPUS
- Title
- Orientation-dependent x-ray absorption fine structure of ZnO nanorods
- Authors
- Han, SW; Yoo, HJ; An, SJ; Yoo, J; Yi, GC
- Date Issued
- 2005-01-10
- Publisher
- AMER INST PHYSICS
- Abstract
- The local structure of two samples of vertically well-aligned ZnO nanorods with average diameters of 13 and 37 nm were studied using orientation-dependent x-ray absorption fine structure (XAFS) at the Zn K edge. The aligned ZnO nanorod samples were fabricated on sapphire (0001) substrates with a catalyst-free metalorganic vapor-phase epitaxy method. The XAFS measurements showed that both nanorod samples have a well-ordered wurtzite structure and that no vacancy was observed at either site of zinc or oxygen atoms. However, we found that in both samples the lattice constants of a and b were shrunken by similar to0.04 Angstrom while c was elongated by similar to0.1 Angstrom, compared with those of their bulk counterparts. Furthermore, there was a substantial amount of disorder in the bond length of the only Zn-O pairs located near the ab plane. This may suggest that the terminating atoms at the boundaries of the nanorods are oxygen atoms. (C) 2005 American Institute of Physics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9503
- DOI
- 10.1063/1.1851616
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 86, no. 2, 2005-01-10
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