Helical microtubules of graphitic carbon View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1991-11

AUTHORS

Sumio Iijima

ABSTRACT

THE synthesis of molecular carbon structures in the form of C60 and other fullerenes1 has stimulated intense interest in the structures accessible to graphitic carbon sheets. Here I report the preparation of a new type of finite carbon structure consisting of needle-like tubes. Produced using an arc-discharge evaporation method similar to that used for fullerene synthesis, the needles grow at the negative end of the electrode used for the arc discharge. Electron microscopy reveals that each needle comprises coaxial tubes of graphitic sheets, ranging in number from 2 up to about 50. On each tube the carbon-atom hexagons are arranged in a helical fashion about the needle axis. The helical pitch varies from needle to needle and from tube to tube within a single needle. It appears that this helical structure may aid the growth process. The formation of these needles, ranging from a few to a few tens of nanometres in diameter, suggests that engineering of carbon structures should be possible on scales considerably greater than those relevant to the fullerenes. More... »

PAGES

56-58

References to SciGraph publications

  • 1985-11. C60: Buckminsterfullerene in NATURE
  • 1990-09-27. Solid C60: a new form of carbon in NATURE
  • Journal

    TITLE

    Nature

    ISSUE

    6348

    VOLUME

    354

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/354056a0

    DOI

    http://dx.doi.org/10.1038/354056a0

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