Laser-induced production of large carbon-based toroids

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Abstract

We report on the production of large carbon-based toroids (CBTs) from fullerenes. The process involves two-step laser irradiation of a mixed fullerene target (76% C60, 22% C70). Transmission electron microscopy (TEM) clearly identifies toroidal-shaped structures as well as Q-shaped constructs. The typical diameters of the CBTs are ∼0.2–0.3 μm with tubular diameters of ∼50–100 nm, but toroids as wide as 0.5 μm are observed making them nanostructures on the verge of being microstructures.

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Acknowledgments

Support for this work from NASA and the State of Louisiana is appreciated.

References (18)

  • M.F. Lin et al.

    Solid State Commun.

    (1998)
  • M. Ahlskog et al.

    Chem. Phys. Lett.

    (1999)
  • H.W. Kroto et al.

    Nature

    (1985)
  • B.I. Dunlap

    Phys. Rev. B

    (1992)
  • S. Itoh et al.

    Phys. Rev. B

    (1993)
  • S. Itoh et al.

    Phys. Rev. B

    (1993)
  • S. Itoh et al.

    Phys. Rev. B

    (1994)
  • R.C. Haddon

    Nature

    (1997)
  • M.F. Lin et al.

    Phys. Rev. B

    (1998)
There are more references available in the full text version of this article.

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