Computational Investigation of Large-Diameter Carbon Nanotubes in Bundles for High-Strength Materials

Chinomso Onuoha, Grigorii Drozdov, Zhiyong Liang, Gregory M. Odegard, Emilie J. Siochi, Traian Dumitricǎ

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Carbon nanotube aerogels are interesting platforms for the manufacture of lightweight composites. To guide the development, we screen with tight-binding atomistic calculations two primary crystalline organizations of nanotubes with 1.4-4.5 nm radii and 1-3 number of walls. Calculations reveal a crossover from polygonized nanotubes with hexagonal close-packing organizations to collapsed shapes organized in stacks. The energies of the two modes are captured into a concise form, which predicts the crossover radii and domains of their dominance. The graphite-like phase formed with collapsed nanotubes allows for ∼1 TPa Young's moduli. Bundles of collapsed nanotubes emerge as natural candidates for the developmnent of ultrastrong composites.

Original languageEnglish (US)
Pages (from-to)5014-5018
Number of pages5
JournalACS Applied Nano Materials
Volume3
Issue number6
DOIs
StatePublished - Jun 26 2020

Keywords

  • atomistic calculations
  • carbon nanotubes
  • nanocomposites
  • strength
  • Young's moduli

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