Research Article

Nano Research

, Volume 2, Issue 5, pp 373-379

Open Access This content is freely available online to anyone, anywhere at any time.

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

  • Albert G. NasibulinAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology Email author 
  • , Simas RackauskasAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology
  • , Hua JiangAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology
  • , Ying TianAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology
  • , Prasantha Reddy MudimelaAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology
  • , Sergey D. ShandakovAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of TechnologyLaboratory of Carbon NanoMaterials, Department of Physics, Kemerovo State University
  • , Larisa I. NasibulinaAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of Technology
  • , Sainio JaniAffiliated withLaboratory of Physics, Helsinki University of Technology
  • , Esko I. KauppinenAffiliated withNanoMaterials Group, Department of Applied Physics and Center for New Materials, Helsinki University of TechnologyVTT Biotechnology Email author 

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 ° ⊂. 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.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-009-9036-5/MediaObjects/12274_2009_9036_Fig1_HTML.jpg

Keywords

Fe2O3 hematite mechanism nanowire synthesis Address