Electronic structure studies of Fe- ZnO nanorods by x-ray absorption fine structure

Sanjeev Gautam; S. Kumar; P. Thakur; K. H. Chae; Ravi Kumar; C. G. Lee

doi:10.1088/0022-3727/42/17/175406

Electronic structure studies of Fe- ZnO nanorods by x-ray absorption fine structure

Materials Science 2011-11-22 v1 Mesoscale and Nanoscale Physics

Authors: Sanjeev Gautam , S. Kumar , P. Thakur , K. H. Chae , Ravi Kumar , C. G. Lee

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report the electronic structure studies of well characterized polycrystalline Zn_{1-x}Fe_xO (x = 0.0, 0.01, 0.03, and 0.05) nanorods synthesized by a co-precipitation method through 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 2\theta value with Fe doping. The change in the peak positions with increase in Fe contents clearly indicates that Fe ions are replacing Zn ions in the ZnO matrix. Linear combination fittings (LCF) at Fe K-edge demonstrate that Fe is in mixed valent state (Fe3+/Fe2+) with a ratio of ~ 7:3 (Fe3+:Fe2+). XAFS data is successfully fitted to wurtzite structure using IFEFFIT and Artemis. The results indicate that Fe substitutes Zn site in the ZnO matrix in tetrahedral symmetry.

Keywords

Fe-doped ZnO nanorods x-ray absorption fine structure electronic structure wurtzite structure mixed valence state co-precipitation synthesis

Cite

@article{arxiv.0908.1224,
  title  = {Electronic structure studies of Fe- ZnO nanorods by x-ray absorption fine structure},
  author = {Sanjeev Gautam and S. Kumar and P. Thakur and K. H. Chae and Ravi Kumar and C. G. Lee},
  journal= {arXiv preprint arXiv:0908.1224},
  year   = {2011}
}

Comments

7 pages, 5 figures, 2 tables, regular article

Electronic structure studies of Fe- ZnO nanorods by x-ray absorption fine structure

Abstract

Keywords

Cite

Comments

Related papers