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Czechoslovak Journal of Physics

, Volume 56, Supplement 3, pp E51–E61 | Cite as

Multi-walled carbon nanotubes formed by condensed-phase conversions of Fe-C-based nanopowder in vacuum

  • B. David
  • N. Pizúrová
  • O. Schneeweiss
  • P. Bezdička
  • M. Klementová
  • J. Filip
  • R. Alexandrescu
  • F. Dumitrache
  • C. T. Fleaca
  • I. Voicu
  • I. Morjan
Article

Abstract

We describe the formation of multi-walled carbon nanotubes (MWCNTs) which have grown during annealing at 800 °C of Fe-C-based nanopowder in vacuum. The Fe-C-based nanopowder was produced by a laser pyrolysis of gas-phase reactants. The as-synthesized and annealed samples were characterised by TEM, XRD, Mössbauer spectroscopy, Raman spectroscopy, and magnetic measurements. Under the TEM, MWCNTs were observed in the annealed sample. In addition, larger particles with the graphitic shells and various graphitic structures were found. XRD and Mössbauer analysis confirmed that only two iron phases were present in the annealed sample: α-Fe and Fe3C. Phase transformations taking place during the thermal treatment of the sample are discussed.

Key words

iron graphite core-shell nanotubes graphitisation 

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Copyright information

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • B. David
    • 1
  • N. Pizúrová
    • 1
  • O. Schneeweiss
    • 1
  • P. Bezdička
    • 2
  • M. Klementová
    • 2
  • J. Filip
    • 3
  • R. Alexandrescu
    • 4
  • F. Dumitrache
    • 4
  • C. T. Fleaca
    • 4
  • I. Voicu
    • 4
  • I. Morjan
    • 4
  1. 1.Institute of Physics of MaterialsAS CRBrnoCzech Republic
  2. 2.Institute of Inorganic ChemistryAS CRŘež near PragueCzech Republic
  3. 3.Centre for Nanomaterial ResearchPalacky UniversityOlomoucCzech Republic
  4. 4.National Institute for Laser, Plasma and Radiation PhysicsBucharestRomania

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