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Growth Modes and Chiral Selectivity of Single-Walled Carbon Nanotubes


Chemical Vapor Deposition synthesis of Single Walled Carbon Nanotubes experiments, using Fe catalyst, and alternating methane and carbon monoxide as carbon feedstocks, lead 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, characterizing 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 available reports from the literature of the last decade strongly suggests that these latter conditions should favor the near armchair chiral selectivity observed empirically.

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Publication details

The article was received on 22 Dec 2017, accepted on 28 Feb 2018 and first published on 01 Mar 2018

Article type: Paper
DOI: 10.1039/C7NR09539B
Citation: Nanoscale, 2018, Accepted Manuscript
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    Growth Modes and Chiral Selectivity of Single-Walled Carbon Nanotubes

    M. He, Y. Magnin, H. Jiang, H. Amara, E. Kauppinen, A. Loiseau and C. Bichara, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09539B

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