Electronic structure studies of Fe-doped ZnO nanorods by x-ray absorption fine structure
- Electronic structure studies of Fe-doped ZnO nanorods by x-ray absorption fine structure
- Sanjeev Gautam; Shalendra Kumar; P. Thakur; 채근화; Ravi Kumar; B. H. Koo; C. G. Lee
- Electronic structure; ZnO nanorods; x-ray absorption fine structure
- Issue Date
- Journal of physics D, applied physics
- VOL 42, NO 17, 175406-1-175406-7
- We report the electronic structure studies of well-characterized polycrystalline Zn1−xFexO
(x = 0.0, 0.01, 0.03 and 0.05) nanorods synthesized by a co-precipitation method using x-ray
absorption fine structure (XAFS). X-ray diffraction (XRD) reveals that Fe-doped ZnO
crystallizes in a single phase wurtzite structure without any secondary phase. From the XRD
pattern, it is observed that peak positions shift towards lower 2θ value with Fe doping. The
change in the peak positions with increase in Fe contents clearly indicates that Fe ions replace
Zn ions in the ZnO matrix. Linear combination fittings at Fe K-edge demonstrate that Fe is in a
mixed-valent state (Fe3+/Fe2+) with a ratio of ∼7 : 3 (Fe3+ : Fe2+). XAFS data are successfully
fitted to wurtzite structure using IFEFFIT and Artemis. The results indicate that Fe substitutes
Zn site in the ZnO matrix in tetrahedral symmetry.
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