research10.1039/c5nr06431g

Highly stretchable MoS2 kirigami

Abstract

We report the results of classical molecular dynamics simulations focused on studying the mechanical properties of MoS2 kirigami. Several different kirigami structures were studied based upon two simple non-dimensional parameters, which are related to the density of cuts, as well as the ratio of the overlapping cut length to the nanoribbon length. Our key findings are significant enhancements in tensile yield (by a factor of four) and fracture strains (by a factor of six) as compared to pristine MoS2 nanoribbons. These results, in conjunction with recent results on graphene, suggest that the kirigami approach may be generally useful for enhancing the ductility of two-dimensional nanomaterials.P. Z. H. and Z. Q. acknowledge the support of the Physics and Mechanical Engineering Departments at Boston University. D. K. C. is grateful for the hospitality of the Aspen Center for Physics which is supported by NSF Grant #PHY-1066293, and of the International Institute for Physics of the Federal University of Rio Grande do Norte, in Natal, Brazil, where some of this work was completed. (Physics and Mechanical Engineering Departments at Boston University; PHY-1066293 - NSF)Accepted manuscrip

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