We find by ab initio simulations that significant overall tensile strain can be induced by pure bending in a wide range of two-dimensional crystals perpendicular to the bending moment, just like an accordion being bent to open. This bending-induced tensile strain increases in a power law with bent curvature and can be over 20% in monolayered black phosphorus and transition metal dichalcogenides at a moderate curvature of 2nm-1 but more than an order weaker in graphene and hexagon boron nitride. This accordion effect is found to be a quantum mechanical effect raised by the asymmetric response of chemical bonds and electron density to the bending curvature.
CITATION STYLE
Pan, D., Li, Y., Wang, T. C., & Guo, W. (2017). Bending-induced extension in two-dimensional crystals. Acta Mechanica Sinica/Lixue Xuebao, 33(1), 71–76. https://doi.org/10.1007/s10409-016-0602-2
Mendeley helps you to discover research relevant for your work.