Role of defect healing on the chirality of single-wall carbon nanotubes
type: Dataset
description: Although significant efforts have been directed towards a selective single wall carbon nanotube synthesis, the resulting diameter and chirality distributions are still too broad and their control remains a challenge. Progress in this direction requires an understanding of the mechanisms leading to the chiral selectivity reported by some authors. Here, we focus on one possible such mechanism and investigate the healing processes of defective tubes, at the atomic scale. We use tight-binding Monte Carlo simulations to perform a statistical analysis of the healing of a number of defective tubes. We study the role of temperature as a primary factor to overcome the energy barriers involved by healing, as well as the role of the metal catalyst. Using both electron diffraction patterns and local characterizations, we show that the healing proceeds first along the tube axis, before spreading laterally, and observe the competition between two or more chiralities. The resulting picture is that no chirality seems to be favored by the healing mechanisms, implying that the reported chiral preference should result from other sources.
issued: 2026-05-21T14:11:17.774381
language: en
modified: 2026-05-21T14:11:17.774388
contact point: Organization
  fn: CCSD
keyword: carbon-nanotubes
keyword: chirality
keyword: healing-of-defects
keyword: infoeu-reposemanticspreprint
keyword: nickel-catalyst
keyword: physcondcm-msphysics-physicscondensed-matter-cond-matmaterials-science-cond-matmtrl-sci
keyword: preprints-working-papers-
landing page: https://hal.science/hal-00688804

Role of defect healing on the chirality of single-wall carbon nanotubes
type: Distribution
format: HTML
issued: 2026-05-21T14:11:17.841069
modified: 2026-05-21T14:11:17.752289
access URL: https://hal.science/hal-00688804

test_moissonnage_selune
type: Agent