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Crystalline Ropes of Metallic Carbon Nanotubes

Thess1, Lee, Nikolaev

  • 1A. Thess, P. Nikolaev, H. Dai, C. Xu, A. G. Rinzler, D. T. Colbert, G. E. Scuseria, R. E. Smalley, Center for Nanoscale Science and Technology, Rice Quantum Institute, and Departments of Chemistry and Physics, Mail Stop 100, Rice University, Post Office Box 1892, Houston, TX 77251, USA. R. Lee and J. E. Fischer, Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA 19104-6272, USA. P. Petit and J. Robert, Institut Charles Sadron, 6 rue Boussingault, 67000 Strasbourg, France. Y. H. Lee, S. G. Kim, D. Tomanek, Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-1116, USA.

Science (New York, N.Y.)
|July 26, 1996
PubMed
Summary

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High-yield production of uniform single-wall nanotubes (SWNTs) was achieved. These metallic nanotubes self-organized into ropes, demonstrating potential for advanced electronic applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Single-wall nanotubes (SWNTs) are crucial nanomaterials with unique electronic properties.
  • Controlling SWNT diameter and self-assembly is key for targeted applications.

Purpose of the Study:

  • To develop a high-yield method for producing uniform single-wall nanotubes.
  • To characterize the structure, self-organization, and electrical properties of the synthesized SWNTs.

Main Methods:

  • Laser vaporization of a carbon-nickel-cobalt mixture at 1200°C.
  • X-ray diffraction and electron microscopy for structural analysis.
  • Resistivity measurements at 300 Kelvin.

Main Results:

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  • Achieved over 70% yield of SWNTs with uniform diameters (13.8 ± 0.2 Å).
  • SWNTs self-organized into ropes (100–500 SWNTs) in a triangular lattice.
  • Ropes exhibited metallic behavior with low resistivity (<10⁻⁴ Ω·cm).

    • Conclusions:

    • Efficient annealing and atomic interactions dictate uniform SWNT diameter.
    • The (10,10) metallic tube with C5v symmetry is favored.
    • These findings pave the way for scalable production of high-performance nanotube-based devices.