Laboratoire d'Etude des Microstructures, ONERA-CNRS , BP 72, 92322 Châtillon Cedex, France.
Aix-Marseille University and CNRS , CINaM UMR 7325, 13288 Marseille, France.
ACS Nano. 2017 May 23;11(5):4840-4847. doi: 10.1021/acsnano.7b01328. Epub 2017 May 3.
Structural identification of double-walled carbon nanotubes (DWNTs) 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 modeling, 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.
通过最新一代的透射电子显微镜，提出了一种稳健的方法来对双壁碳纳米管（DWNTs）进行结构鉴定，从而可以对大量纳米物体进行基于统计的分析。该方法表明 DWNTs 的内外管并非随机取向，这表明两个同心壁之间存在机械耦合。在原子尺度模型的支持下，我们将其归因于存在非补偿畴，其结构取决于两个管的直径和螺旋性，而内管试图实现局部堆叠取向以减少应变效应。
