Alloy nanowires: Invar inside carbon nanotubes

N. Grobert, M. Mayne, M. Terrones, J. Sloan, R. E. Dunin-Borkowski, R. Kamalakaran, T. Seeger, H. Terrones, M. Rühle, D. R.M. Walton, H. W. Kroto, J. L. Hutchison

Research output: Contribution to journalArticlepeer-review

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Invar (Fe65Ni35), a 'zero' thermal expansion alloy consisting of Fe and Ni, has been successfully introduced into carbon nanotubes by pyrolysing, at 800 °C, aerosols of NiCp2/FeCp2 mixtures dissolved in C6H6; scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) studies reveal the presence of flake-like structures (ca. 1-2 mm2) consisting of filled/aligned carbon nanotubes (≤200 μm in length and ≤80 nm in diameter) in a carpet pile-like configuration; analysis of the filling material (≤500 nm in length and ≤40 nm in diameter) by X-ray powder diffraction and high-resolution electron energy loss spectroscopy (HREELS) line scans, confirmed that Invar was formed; this appears, to the best of our knowledge, to be the first report of mixed metal alloy nanowires forming inside carbon nanotubes.

Original languageEnglish (US)
Pages (from-to)471-472
Number of pages2
JournalChemical Communications
Issue number5
StatePublished - Mar 7 2001

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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