Structural Properties of Double-Walled Carbon Nanotubes driven by Mechanical Interlayer Coupling

Ahmed Ghedjatti (1) , Yann Magnin (2) , Frédéric Fossard (1) , Guillaume Wang (3) , Hakim Amara (1) , Emmanuel Flahaut (4) , Jean‐sébastien Lauret (5) , Annick Loiseau (1)

1 LEM - ONERA - CNRS - Laboratoire d'étude des microstructures [Châtillon]
2 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille
3 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
4 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
5 LAC - Laboratoire Aimé Cotton

Structural identification of double-walled carbon nanotubes (DWNT) is presented through a robust procedure based on the latest generation of transmission electron microscope, making possible a statistical analysis based on numerous nano-objects. This approach reveals that inner and outer tubes of DWNTs are not randomly oriented, suggesting the existence of a mechanical coupling between the two concentric walls. With the support of atomic scale modelisations, we attribute it to the presence of incommensurate domains whose structures depend on the diameters and helicities of both tubes, and where inner tubes try to achieve a local stacking orientation to reduce strain effects.

Mots clés: Doubel-Walled Carbon Nanotubes; HRTEM; van der Waals; Atomic scale modeling

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Ahmed Ghedjatti, Yann Magnin, Frédéric Fossard, Guillaume Wang, Hakim Amara, et al.. Structural Properties of Double-Walled Carbon Nanotubes driven by Mechanical Interlayer Coupling. 2017. ⟨hal-01441517v1⟩