Volume 111, Number 1, July 2015
|Number of page(s)||5|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||29 July 2015|
Modification of surface chemistry by lattice Sn doping in BiFeO3 nanofibers
1 Entropic Interface Group (EIG), Engineering Product Development, Singapore University of Technology and Design (SUTD) - 8 Somapah Road, Singapore 487372
2 Department of Physics and Engineering Physics, University of Saskatchewan - 116 Science Place, Saskatoon, SK, S7N 5B2, Canada
3 Canadian Light source, Inc., University of Saskatchewan - 44 Innovation Boulevard, Saskatoon, SK, S7N 2V3, Canada
Received: 9 February 2015
Accepted: 6 July 2015
Results on X-ray near edge structure (XANES) study on Sn-doped BiFeO3 (BFO) nanofibers with varying Sn concentrations of 1%, 3%, and 5% are reported. The results indicate that the oxidation state of Sn ions in the BFO structure is +4. In addition, we observe a bismuth peak (Bi M1) at 4000 eV in the XANES spectrum, suggesting the diffusion of Bi ions onto the surface of BFO nanostructure. The diffusion is attributed to the charge compensation between donor electrons from the Sn atoms and Bi vacancies. These findings are of high relevance to surface chemistry reactions in sensing and catalytic applications.
PACS: 81.07.Gf – Nanowires / 61.05.cj – X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc. / 61.72.U- – Doping and impurity implantation
© EPLA, 2015
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