Growth mechanisms of carbon nanotubes converted from diamond-like carbon films

Trying to understand the growth mechanism of the carbon nanotubes (CNTs), a very simple growth approach was undertaken. Nanotubular structures were grown from diamond-like carbon (DLC) films. Vacuum annealing of DLC (C-sp 3 rich) films mixed with catalysts in argon atmosphere at 1000 °C leads to the...

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Bibliographic Details
Published in:Chemical physics letters 2004-10, Vol.397 (4), p.516-519
Main Authors: Sarangi, D., Godon, C., Granier, A., Goullet, A., Turban, G., Chauvet, O.
Format: Article
Language:English
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Summary:Trying to understand the growth mechanism of the carbon nanotubes (CNTs), a very simple growth approach was undertaken. Nanotubular structures were grown from diamond-like carbon (DLC) films. Vacuum annealing of DLC (C-sp 3 rich) films mixed with catalysts in argon atmosphere at 1000 °C leads to the formation of the nanotubular structures. In the same growth process graphite (100% C-sp 2) does not promote to form CNTs. We proposed the growth mechanism in two step process: (1) conversion of C-sp 3 phase into C-sp 2 phase in the presence of the catalyst(s) at elevated temperature; (2) crystallization and rolling of C-sp 2 in tubular shape.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2004.09.020