Reduced carbon solubility in Fe nanoclusters and implications for the growth of single-walled carbon nanotubes.


Journal Article

Fe nanoclusters are becoming the standard catalysts for growing single-walled carbon nanotubes via chemical vapor decomposition. Contrary to the Gibbs-Thompson model, we find that the reduction of the catalyst size requires an increase of the minimum temperature necessary for the growth. We address this phenomenon in terms of solubility of C in Fe nanoclusters and, by using first-principles calculations, we devise a simple model to predict the behavior of the phases competing for stability in Fe-C nanoclusters at low temperature. We show that, as a function of particle size, there are three scenarios compatible with steady state growth, limited growth, and no growth of single-walled carbon nanotubes, corresponding to unaffected, reduced, and no solubility of C in the particles.

Full Text

Duke Authors

Cited Authors

  • Harutyunyan, AR; Awasthi, N; Jiang, A; Setyawan, W; Mora, E; Tokune, T; Bolton, K; Curtarolo, S

Published Date

  • May 14, 2008

Published In

Volume / Issue

  • 100 / 19

Start / End Page

  • 195502 -

PubMed ID

  • 18518458

Pubmed Central ID

  • 18518458

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.100.195502


  • eng