Letter | Published:

Thinning and opening of carbon nanotubes by oxidation using carbon dioxide

Nature volume 362, pages 520522 (08 April 1993) | Download Citation

Subjects

Abstract

THE discovery1 and bulk synthesis2 of carbon nanotubes has stimulated great interest. It has been suggested that these structures may have useful electronic3–5 and mechanical6 properties, and these might be modified by introducing foreign materials into the nanotubes. But the tubes are invariably capped at the ends. Ajayan and lijima7 have succeeded in drawing molten material (lead or one of its compounds) into the tubes by heating them in the presence of lead and oxygen; less than 1% of the tubes in the sample studied could be filled in this way. Here we report that heating in carbon dioxide gas can result in the partial or complete destruction of the tube caps and stripping of the outer layers to produce thinner tubes. In some cases, we have thinned the extremity of tubes to a single layer. The opened tubes can be regarded as nanoscale test-tubes for adsorption of other molecules, and this controlled method of thinning may allow studies of the properties of single tubes.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    Nature 354, 56–58 (1991).

  2. 2.

    & Nature 358, 220–221 (1992).

  3. 3.

    , , & Appl. Phys. Lett. 60, 2204–2206 (1992).

  4. 4.

    , & Phys. Rev. Lett. 68, 631–634 (1992).

  5. 5.

    , & Phys. Rev. Lett. 68, 1579–1582 (1992).

  6. 6.

    , & Z. Phys. D (in the press).

  7. 7.

    & Nature 361, 333–334 (1993).

  8. 8.

    , , & Nature 347, 354–358 (1990).

  9. 9.

    , & Faraday Trans. (in the press).

  10. 10.

    , & J. Am. chem. Soc. 60, 309–311 (1938).

  11. 11.

    , & Nature 356, 776–778 (1992).

  12. 12.

    Phil. Trans. R. Soc. A. (in the press).

  13. 13.

    Chem. Phys. Lett. 198, 596–602 (1992).

  14. 14.

    Nature 358, 195–196 (1992).

  15. 15.

    Catalytic Steam Reforming in Science and Technology (eds Anderson, J. R. & Boudart, M.) 2–117 (Springer, Berlin, 1984).

Download references

Author information

Affiliations

  1. Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK

    • S. C. Tsang
    •  & M. L. H. Green
  2. Chemical Crystallography Laboratory, University of Oxford, Parks Road, Oxford OX1 3PD, UK

    • P. J. F. Harris

Authors

  1. Search for S. C. Tsang in:

  2. Search for P. J. F. Harris in:

  3. Search for M. L. H. Green in:

About this article

Publication history

Received

Accepted

Published

DOI

https://doi.org/10.1038/362520a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.