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Here, the atomistic mechanics of back folding around triangular nanovoids in monolayer WS<jats:sub>2<\/jats:sub> sheets is examined. Combining atomic\u2010resolution images from annular dark\u2010field 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 WS<jats:sub>2<\/jats:sub> 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 Moir\u00e9 lattices.<\/jats:p>","DOI":"10.1002\/smll.202104238","type":"journal-article","created":{"date-parts":[[2021,10,28]],"date-time":"2021-10-28T05:52:04Z","timestamp":1635400324000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Atomistic Mechanics of Torn Back Folded Edges of Triangular Voids in Monolayer WS<sub>2<\/sub>"],"prefix":"10.1002","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8992-8694","authenticated-orcid":false,"given":"Gyeong Hee","family":"Ryu","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering Gyeongsang National University  Jinju 52828 Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gang 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