NOVEL STRUCTURES FROM ARC-VAPORIZED CARBON AND METALS: SINGLE-LAYER CARBON NANOTUBES AND METALLOFULLERENES

C.-H. Kiang, P.H.M. van Loosdrecht, R. Beyers, J.R. Salem, D.S. Bethune, W.A. Goddard, H.C. Dorn, P. Burbank and S. Stevenson
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C.-H. Kiang: IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
P.H.M. van Loosdrecht: IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
R. Beyers: IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
J.R. Salem: IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
D.S. Bethune: IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
W.A. Goddard: Materials and Molecular Simulation Center, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
H.C. Dorn: Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
P. Burbank: Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
S. Stevenson: Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 765-769

Abstract: By covaporizing metals with carbon in a fullerene generator, diverse fullerene-related structures can be produced. Adding cobalt to the graphite anode leads to the production of single-layer carbon nanotubes. We find that the relative abundance of tubes with different diameters can be successfully altered by the presence of various catalyst promoters such as sulfur, bismuth, or lead. If Sc is covaporized in the arc, many Sc-containing metallofullerenes form abundantly. PurifiedSc3@C82has been obtained by HPLC techniques, and its dynamics have been investigated using electron paramagnetic resonance spectroscopy. The unusually large, strongly temperature-dependent linewidths and the temperature-dependent hyperfine coupling suggest that the Sc atoms form a trimer which rapidly reorients within theC82cage.

Date: 1996
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DOI: 10.1142/S0218625X96001376

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