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  • Hollow hematite (α-Fe2O3) fine fibers were fabricated via a simple, flexible, and scalable technique.

  • An aqueous solution with iron precursor/polymer was used in the centrifugal spinning process

  • Developed fibers show average wall thickness of 55 ± 15 nm and outer fiber diameter of 852 ± 86 nm


Hollow hematite (α-Fe2O3) fine fibers with multiwall structure were synthesized by utilizing a centrifugal spinning technique. Aqueous solutions of polyvinyl pyrrolidone and iron (III) nitrate nonahydrate were prepared and spun into fibers. The precursor fibers were heat treated at 650 °C to form iron oxide fibers. Scanning electron micrographs revealed the formation of iron oxide hollow fibers with multiwall structure with average wall thickness of 55 ± 15 nm and outer fiber diameter of 852 ± 86 nm. The formation of α-Fe2O3 was confirmed by X-ray diffraction analysis and the phase identification was verified by XRD pattern and transmission electron microscopy analysis. These hollow structure α-Fe2O3 fibers have promising uses in important biological processes and biomedical applications.


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Materials Science and Engineering: C





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