Helical microtubules of graphitic carbon

@article{Iijima1991HelicalMO,
  title={Helical microtubules of graphitic carbon},
  author={Sumio Iijima},
  journal={Nature},
  year={1991},
  volume={354},
  pages={56-58}
}
  • S. Iijima
  • Published 1 November 1991
  • Physics
  • Nature
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… 

X-ray diffraction study of carbon microtubules

The synthesis of molecular carbon structures in the form of C60 and other fullerenes [1] has stimulated intense interest in the structure accessible to graphitic carbon sheets. High resolution

Ultrathin graphitic structures and carbon nanotubes in a purified synthetic graphite.

  • P. Harris
  • Materials Science
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2009
A new class of carbon structure is reported, which consists of microscale graphitic shells bounded by curved and faceted planes containing two to five layers, believed to form during a purification process which involves passing an electric current through the graphite in the presence of a reactive gas.

Cobalt-catalysed growth of carbon nanotubes with single-atomic-layer walls

CARBON exhibits a unique ability to form a wide range of structures. In an inert atmosphere it condenses to form hollow, spheroidal fullerenes1–4. Carbon deposited on the hot tip of the cathode of

Electronic Structure of Fullerene Tubules

The synthesis of macroscopic amounts of the fullerenes C60 and C70 and the availability of these materials has led to an explosive growth of research efforts in novel all-carbon materials.1,2 Less

Growth of carbon nanotubes

Carbon nanocones: wall structure and morphology

The carbon nanocones are found to exhibit several interesting structural features; instead of having a uniform cross-section, the walls consist of a relatively thin inner graphite-like layer with a non-crystalline envelope, where the amount of the latter can be modified significantly by annealing.

Group of Carbon

Crystalline Ropes of Metallic Carbon Nanotubes

X-ray diffraction and electron microscopy showed that fullerene single-wall nanotubes (SWNTs) are nearly uniform in diameter and that they self-organize into “ropes,” which consist of 100 to 500 SWNTs in a two-dimensional triangular lattice with a lattice constant of 17 angstroms.

Carbon Nanotubes: Synthesis and Characterization

Carbon can form various types of structurally different frameworks due to the ability of the carbon atoms to form different species of valence bonds. The extremely organized coagulation process of
...

References

SHOWING 1-10 OF 11 REFERENCES

C60: Buckminsterfullerene

During experiments aimed at understanding the mechanisms by which long-chain carbon molecules are formed in interstellar space and circumstellar shells1, graphite has been vaporized by laser

Growth, Structure, and Properties of Graphite Whiskers

Graphite whiskers have been grown in a dc arc under a pressure of 92 atmospheres of argon and at 3900°K. They are embedded in a solid matrix of graphite which builds up by diffusion of carbon vapor

Solid C60: a new form of carbon

A new form of pure, solid carbon has been synthesized consisting of a somewhat disordered hexagonal close packing of soccer-ball-shaped C60 molecules. Infrared spectra and X-ray diffraction studies

Space, Stars, C60, and Soot

The intriguing revelation that 12 pentagonal "defects" convert a planar hexagonal array of any size into a quasi-icosahedral cage explains why some intrinsically planar materials form quasi-crystalline particles, as appears to occur in the case of soot.

Cohesive mechanism and energy bands of solid C60.

We present microscopic total-energy calculations which provide a cohesive property and electronic structures of a new form of solid carbon, the face-centered-cubic ${\mathrm{C}}_{60}$ crystal (fcc