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Nano Research

Article Title

Simple and rapid synthesis of α-Fe2O3 nanowires under ambient conditions

Authors

Albert G. Nasibulin, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Simas Rackauskas, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Hua Jiang, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Ying Tian, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Prasantha Reddy Mudimela, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Sergey D.Shandakov, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland Laboratory of Carbon NanoMaterials, Department of Physics, Kemerovo State University, Kemerovo 650043, Russia
Larisa, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
. Nasibulina, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland
Jani Sainio, Laboratory of Physics, Helsinki University of Technology, Otakaari 1 M, 02150, Espoo, Finland
Esko I. Kauppinen, NanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology, Puumiehenkuja2, 02150, Espoo, Finland VTT Biotechnology, Biologinkuja 7, 02044, Espoo, Finland

Keywords

Fe2O3, hematite, mechanism, nanowire, synthesis

Abstract

We propose a simple method for the efficient and rapid synthesis of one-dimensional hematite (α -Fe2O3) nanostructures based on electrical resistive heating of iron wire under ambient conditions. Typically, 1–5 μm long α-Fe2O3 nanowires were synthesized on a time scale of seconds at temperatures of around 700 ° C. The morphology, structure, and mechanism of formation of the nanowires were studied by scanning and transmission electron microscopies, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Raman techniques. A nanowire growth mechanism based on diffusion of iron ions to the surface through grain boundaries and to the growing wire tip through stacking fault defects and due to surface diffusion is proposed.

Graphical Abstract

Publisher

Tsinghua University Press

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