Affiliation of Author(s):航空学院

Journal:Nanotechnology

Abstract:Understanding the mechanical behaviors of van der Waals heterogeneous 2D materials is important for their actual applications. Our extensive first-principles calculations and continuum mechanical modeling on the wrinkling of MoSe2/WSe2heterobilayers caused by compression reveal that the bending stiffness of MoSe2/WSe2wrinkles strongly depend on the wrinkle structures, which first increase and then decrease with increasing the compressive strain. The bending stiffness of MoSe2/WSe2wrinkles could be effectively mediated and tuned by adjusting the wrinkle geometry and size. The underlying mechanisms are elucidated by the differences in electronic structures and bonding states at the top, middle and bottom parts of the wrinkles, and the relevance of the changes of bond lengths to flexural deformation. Our results suggest a feasible way to develop flexible devices and nanoelectromechanical systems by utilizing the correlation and coupling between the mechanical and electronic properties in MoSe2/WSe2wrinkles. © 2017 IOP Publishing Ltd.

ISSN No.:0957-4484

Translation or Not:no

Date of Publication:2017-04-18

Co-author:Qiu, Jiapeng,Guo Wanlin

Correspondence Author:Guo Yufeng