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Effects of Catalyst Promoters on the Growth of Single-Layer Carbon Nanotubes

Published online by Cambridge University Press:  15 February 2011

Ching-Hwa Kiang ,
William A. Goddard III ,
Robert Beyers ,
Jesse R. Salem  and
Donald S. Bethune
Ching-Hwa Kiang
Affiliation:
IBM Research Division, Almaden Research Center, San Jose, CA 95120 Materials and Molecular Simulation Center, Beckman Institute, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
William A. Goddard III
Affiliation:
Materials and Molecular Simulation Center, Beckman Institute, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
Robert Beyers
Affiliation:
IBM Research Division, Almaden Research Center, San Jose, CA 95120
Jesse R. Salem
Affiliation:
IBM Research Division, Almaden Research Center, San Jose, CA 95120
Donald S. Bethune
Affiliation:
IBM Research Division, Almaden Research Center, San Jose, CA 95120
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Abstract

The discovery of a catalytic route to the growth of single-layer carbon nanotubes suggests that it may be possible to produce these materials with better selectivity and in higher yield. Increasing the production efficiency is essential for characterization and application of these materials. We have discovered several catalyst promoters, in particular S, Bi, and Pb, that greatly enhance the single-layer carbon nanotube yield, and extend the distribution of nanotube diameters to much larger sizes (> 3 nm). Co crystallites encapsulated in graphitic polyhedra also form abundantly when S, Bi, or W is present. Understanding these catalytic process is of substantial scientific and technological importance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 359: Symposium G – Science and Technology of Fullerene Materials , 1994 , 69
Copyright
Copyright © Materials Research Society 1995

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References

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