The mechanical and physical properties of heterostructures formed by stacking different two-dimensional materials show great potential for the next generation of electronic/optoelectronic materials. Understanding the mechanical properties in the laminated structure is extremely significant in engineering. Aimed at the performance characterization of a vertical heterostructure, a synergistic experimental measurement method for the mechanical properties of graphene (Gr)/MoS₂ heterostructures is proposed. First, Raman spectroscopy and photoluminescence (PL) spectroscopy are applied to calibrate and compare the coefficients of the peak shifts to the strain in the monolayer MoS₂. Then the strain-field information of MoS₂ in the in-situ loading process of the substrate is measured, and the tangential interfacial stress distribution and evolution are analysed. Based on the calibration experiment, the strain fields of the two layers in the Gr/MoS₂ heterostructure are measured, and the interfacial mechanical properties of the Gr-MoS₂ and MoS₂-substrate interface are obtained. Finally, the difference of the mechanical parameters between MoS₂ and the Gr/MoS₂ on a flexible substrate are compared. This work provides a reference for the design and optimization of heterostructures in device engineering applications.

通过堆叠不同二维材料形成的异质结构的机械和物理特性显示出下一代电子/光电材料的巨大潜力。了解层状结构的力学性能在工程中具有极其重要的意义。针对垂直异质结构的性能表征，提出了一种用于石墨烯(Gr)/MoS ₂异质结构力学性能的协同实验测量方法。首先，应用拉曼光谱和光致发光 (PL) 光谱来校准和比较单层 MoS ₂中的峰位移系数。那么 MoS ₂的应变场信息测量了基体在原位加载过程中的应力，分析了切向界面应力的分布和演化。基于校准实验，测量了Gr/MoS ₂异质结构中两层的应变场，获得了Gr-MoS ₂和MoS _{2 -}衬底界面的界面力学性能。最后，比较了柔性基板上MoS ₂和 Gr/MoS ₂之间机械参数的差异。该工作为器件工程应用中异质结构的设计和优化提供了参考。