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High-Density Production of Carbon Nanotubes in Contact Arc-Discharge at Low Helium Pressure

Published online by Cambridge University Press:  22 February 2011

Dan Zhou ,
Su Wang ,
Supapan Seraphin  and
James C. Withers
Dan Zhou
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ 85721
Su Wang
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ 85721
Supapan Seraphin
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ 85721
James C. Withers
Affiliation:
Materials Electrochemical Research Corp., 7960 S Kolb Rd, Tucson, AZ 85706
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Abstract

We report here on the structural properties of carbon nanotubes prepared by contact arc-discharge at low helium pressure of 100 torr. In contrast to the conventional arcdischarge, the contact discharge reduces the gap between the electrodes to a minimum value while still maintaining a plasma. The resulting carbonaceous deposit on the cathode surface, with the contact discharge operating under 100 torr helium atmosphere, contains the columnar structures with high density carbon nanotubes. These columnar structures are several millimeters in length, much longer than those generated under the conventional arc-discharge. These experimental results reveal that reducing the gap adds greater stability to the arc-discharge and establishes conditions that favor high-density nanotube growth under a low helium pressure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 349: Symposium T – Novel Forms of Carbon II , 1994 , 337
Copyright
Copyright © Materials Research Society 1994

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References

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