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Bending-induced extension in two-dimensional crystals

Pan Douxing ¹ Li Yao ² Wang Tzuchiang ¹ Guo Wanlin ²

文摘	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 2 nm~(-1) butmore 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.
来源	Acta Mechanica Sinica ,2017,33(1):71-76 【核心库】
DOI	10.1007/s10409-016-0602-2
关键词	Monolayer black phosphorus ; Bending to extension ; Accordion effect ; Density functional theory
地址	1. Institute of Mechanics, Chinese Academy of Sciences, State Key Laboratory of Nonlinear Mechanics, Beijing, 100190 2. Nanjing University of Aeronautics and Astronautics, State Key Laboratory of Mechanics and Control for Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices (MOE), Nanjing, 210016
语种	英文
文献类型	研究性论文
ISSN	0567-7718
学科	化学;晶体学
基金	supported by the 973 program ; 国家自然科学基金 ; the Fundamental Research Funds for the Central Universities
文献收藏号	CSCD:5928113

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引证文献 2 篇

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