Ion irradiation of carbon nanotubes encapsulating cobalt crystals

O. Lehtinen, L. Sun, T. Nikitin, A. V. Krasheninnikov, L. Khriachtchev, J. A. Rodríguez-Manzo, M. Terrones, F. Banhart, J. Keinonen

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The response of multi-walled carbon nanotubes encapsulating Co nanorods to ion irradiation was studied. The irradiation experiments with medium ion energies (40-500 keV) were carried out at high temperatures and combined with transmission electron microscopy and Raman characterization of the irradiated samples. Contrary to electron irradiation and high-energy (100 MeV) ion irradiation, we did not see accumulation of pressure inside irradiated nanotubes. We found that nanotubes with Co nanorods inside were transformed to amorphous carbon rods encapsulating Co clusters with typical diameters of 3-6 nm. As Co is magnetic, such one-dimensional composite systems could be used for various applications such as magnetic data storage or magnetic resonance imaging.

Original languageEnglish (US)
Pages (from-to)2618-2621
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number7
StatePublished - May 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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