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In Situ Observation of Nucleation and Growth of Carbon Nanotubes from Iron Carbide Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Hideto Yoshida ,
Seiji Takeda ,
Tetsuya Uchiyama ,
Hideo Kohno  and
Yoshikazu Homma
Hideto Yoshida
Affiliation:
yoshida@tem.phys.sci.osaka-u.ac.jp, Osaka University, Osaka, Japan
Seiji Takeda
Affiliation:
yoshida@tem.phys.sci.osaka-u.ac.jp, Osaka University, Osaka, Japan
Tetsuya Uchiyama
Affiliation:
yoshida@tem.phys.sci.osaka-u.ac.jp, Osaka University, Osaka, Japan
Hideo Kohno
Affiliation:
yoshida@tem.phys.sci.osaka-u.ac.jp, Osaka University, Osaka, Japan
Yoshikazu Homma
Affiliation:
yoshida@tem.phys.sci.osaka-u.ac.jp, Osaka University, Osaka, Japan
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Abstract

Nucleation and growth processes of carbon nanotubes (CNTs) in iron catalyzed chemical vapor deposition (CVD) have been observed by means of in-situ environmental transmission electron microscopy. Our atomic scale observations demonstrate that solid state iron carbide (Fe3C) nanoparticles act as catalyst for the CVD growth of CNTs. Iron carbide nanoparticles are structurally fluctuated in CVD condition. Growth of CNTs can be simply explained by bulk diffusion of carbon atoms since nanoparticles are carbide.

Keywords

transmission electron microscopy (TEM)nanostructurechemical vapor deposition (CVD) (deposition)

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References

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