6533b86cfe1ef96bd12c8325
RESEARCH PRODUCT
Rippling of two-dimensional materials by line defects
Topi KähäräPekka Koskinensubject
Materials sciencemechanical deformationelastic modulus02 engineering and technology01 natural scienceslaw.inventionlaw0103 physical sciencesgrafeeniElasticity (economics)materiaalitiede010306 general physicsSofteningCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsline defectsGraphenebending021001 nanoscience & nanotechnologykimmoisuusfysikaaliset ominaisuudetLine defectsNonlinear systemMultiscale couplingRipplingkiinteän olomuodon fysiikka0210 nano-technologydescription
Two-dimensional materials and their mechanical properties are known to be profoundly affected by rippling deformations. However, although ripples are fairly well understood, less is known about their origin and controlled modification. Here, motivated by recent reports of laser-controlled creation of line defects in graphene, we investigate how line defects could be used to control rippling in graphene and other two-dimensional materials. By sequential multi-scale coupling of density-functional tight-binding and continuum elasticity simulations, we quantify the amount of rippling when the number and the cumulative length of the line defects increase. Simulations show that elastic sheets with networks of line defects create rippling that induces considerable out-of-plane rigidification and in-plane softening with non-linear elastic behavior. We hope that these insights help to guide experimental attempts to modify the mechanical properties of graphene and other two-dimensional materials.
year | journal | country | edition | language |
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2020-08-18 | Physical Review B |