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Evidence of correlation between catalyst particles and the single-wall carbon nanotube diameter: a first step towards chirality control.

Authors
  • Fiawoo, M-F C
  • Bonnot, A-M
  • Amara, H
  • Bichara, C
  • Thibault-Pénisson, J
  • Loiseau, A
Type
Published Article
Journal
Physical Review Letters
Publisher
American Physical Society
Publication Date
May 11, 2012
Volume
108
Issue
19
Pages
195503–195503
Identifiers
PMID: 23003056
Source
Medline
License
Unknown

Abstract

Controlling the structure of single-wall carbon nanotubes during their synthesis by chemical vapor deposition remains a challenging issue. Here, using a specific synthesis protocol and ex situ transmission electron microscopy, we perform a statistical analysis of the structure of the tubes and of the catalyst particles from which they grow. We discriminate two nucleation modes, corresponding to different nanotube-particle junctions, that occur independently of the particle size. With the support of tight binding calculations, we show that a direct control of the nanotube diameter by the particle can only be achieved under growth conditions close to thermodynamic equilibrium.

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