Growth modes and chiral selectivity of single-walled carbon nanotubes

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Qingdao University of Science and Technology
  • Shandong University of Science and Technology
  • CNRS
  • ONERA-CNRS

Abstract

Chemical vapor deposition synthesis of single-walled carbon nanotubes, using an Fe catalyst, and alternating methane and carbon monoxide as carbon feedstocks, leads to the reversible formation of junctions between tubes of different diameters. Combined with an atomistic modeling of the tube/catalyst interface, this shows that the ratio of diameters of the tube and its seeding particle, denoting the growth mode, depends on the carbon fraction inside the catalyst. With carbon monoxide, nanoparticles are strongly carbon enriched, and tend to dewet the tube, in a perpendicular growth mode. Cross-checking our results with the available reports from the literature of the last decade strongly suggests that these latter conditions should favor the near armchair chiral selectivity observed empirically.

Details

Original languageEnglish
Pages (from-to)6744-6750
Number of pages7
JournalNanoscale
Volume10
Issue number14
Publication statusPublished - 14 Apr 2018
MoE publication typeA1 Journal article-refereed

ID: 19084361