The Mobile and Pinned Grain Boundaries in 2D Monoclinic Rhenium Disulfide.

ABSTRACT: In bulk crystals, the kinetics of dislocations is usually hindered by the twining boundaries (TB) or grain boundaries (GB), rendering the well-known grain boundary strengthening effects. Nevertheless, here it is found that in 2D rhenium disulfide (ReS₂), twinning is much easier than dislocation slip. Consequently, the highly mobile TBs or GBs are inversely pinned by the relatively immobile dislocations. Due to the strong in-plane covalent bonding, the GBs in high-symmetry 2D materials such as graphene which consists of defects are immobile at room temperature. In contrast, in monoclinic 2D ReS₂ several types of GBs (including TBs) can be readily generated and driven by mechanical loading. A complete library of the GBs in 2D ReS₂ is established by the (in si

SUBMITTER: Zheng F 

PROVIDER: S-EPMC7675180 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature