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Formation of Nanoparticles in A Carbon Arc

Published online by Cambridge University Press:  15 February 2011

S. A. Majetich ,
J. H. Scott ,
E. M. Brunsman  and
M. E. Mchenry
S. A. Majetich*
Affiliation:
Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213–3890
J. H. Scott
Affiliation:
Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213–3890
E. M. Brunsman
Affiliation:
Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213–3890
M. E. Mchenry
Affiliation:
Materials Science and Engineering Department, Carnegie Mellon University, Pittsburgh, PA 15213–3890
*
Correspondence Author
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Abstract

Details of the carbon-coated nanoparticle growth mechanism are revealed by a comparison of product morphology and reactor parameters. Carbon-coated metal or metal carbide clusters nucleate in the gas phase, grow to characteristic sizes, and deposit on surfaces within the reactor. The surface temperature determines the crystallinity of the nanoparticles and the surrounding carbon. Tungsten carbide nanoparticles show that the carbon coating arises due to phase segregation when the nanoparticle has a lower melting point than that of graphite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 359: Symposium G – Science and Technology of Fullerene Materials , 1994 , 29
Copyright
Copyright © Materials Research Society 1995

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References

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