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Synthesis and characterization of maghemite iron oxide (γ-Fe2O3) nanofibers: novel semiconductor with magnetic feature

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Abstract

Among the reported nanostructural shapes, nanofibers have special interest due to the long axial ratio which has a distinct impact on many chemical and physical properties. In this study, synthesis of the desirable maghemite iron oxide (γ-Fe2O3) nanofibers is introduced. Calcination of electrospun mats composed of ferrous acetate and poly(vinyl alcohol) in argon atmosphere resulted in producing maghemite nanofibers. Detailed characterization affirmed that the obtained γ-Fe2O3 nanofibers are free of other iron oxides. Due to the axial ratio impact, the synthesized nanofibers which have an average diameter of ~70 nm do have magnetic properties resemble γ-Fe2O3 nanoparticles having an average diameter of ~5 nm. Accordingly, the produced nanofibers are considerable candidate for biomagnetic separation of the biomaterials. The prepared γ-Fe2O3 nanofibers can be easily handled as they were obtained in the form of strong mats. Electrical properties study indicated that the introduced nanofibers behave as a semiconducting material. Moreover, the synthesized γ-Fe2O3 nanofibers have band gap energy of ~4.2 eV. Based on the simplicity, effectiveness, high-yield, and low-cost features of the utilized preparation process and the studied physiochemical properties of the obtained product, the synthesized γ-Fe2O3 nanofibers might have considerable application fields.

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Acknowledgements

We thank Mr. T. S. Bae and Mr. J. C. Lim, KBSI, Jeonju branch, and Mr. Jong-Gyun Kang, Centre for University Research Facility, for taking high-quality FESEM and TEM images, respectively.

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Correspondence to Nasser A. M. Barakat.

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Barakat, N.A.M. Synthesis and characterization of maghemite iron oxide (γ-Fe2O3) nanofibers: novel semiconductor with magnetic feature. J Mater Sci 47, 6237–6245 (2012). https://doi.org/10.1007/s10853-012-6543-7

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  • DOI: https://doi.org/10.1007/s10853-012-6543-7

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