Atomistic Mechanics of Torn Back Folded Edges of Triangular Voids in Monolayer WS2
Source abstract
Abstract
Abstract Triangular nanovoids in 2D materials transition metal dichalcogenides have vertex points that cause stress concentration and lead to sharp crack propagation and failure. Here, the atomistic mechanics of back folding around triangular nanovoids in monolayer WS2 sheets is examined. Combining atomic‐resolution images from annular dark‐field scanning transmission electron microscopy with reactive molecular modelling, it is revealed that the folding edge formation has statistical preferences under geometric conditions based on the orientation mismatch. It is further investigated how loading directions and strong interlayer friction, interplay with WS2 lattice's crack preference, govern the deformation and fracture pattern around folding edges. These results provide fundamental insights into the combination of fracture and folding in flexible monolayer crystals and the resultant Moiré lattices.
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Research context
OpenAlex topics: 2D Materials and Applications · Graphene research and applications · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering Gyeongsang National University Jinju 52828 Republic of Korea
Computational Sciences and Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
Materials Graduate Program Texas Materials Institute The University of Texas at Austin 204 East Dean Keeton Street Austin TX 78712 USA
Department of Materials University of Oxford 16 Parks Road Oxford OX1 3PH UK
Walker Department of Mechanical Engineering The University of Texas at Austin 204 East Dean Keeton Street Austin TX 78712 USA
Funding
National Research Foundation of Korea · Laboratory Directed Research and Development · Oak Ridge National Laboratory
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