论文标题
界面气泡的动力学控制范德华异质结构中的粘附力学
Dynamics of an interfacial bubble controls adhesion mechanics in a van der Waals heterostructure
论文作者
论文摘要
2D Van der waals异质结构（VDWH）可能导致新功能，这至关重要地取决于界面结构和混乱。 VDWH接口处的气泡可以修改界面结构。我们通过将其用作NEMS设备的鼓头，因为纳米力学设备是精美的传感器，我们将气泡在石墨烯-HBN VDWH界面的动力学探测。对于具有不同界面气泡的鼓，我们测量了谐振频率和空间模式形状的演变，这是静电拉力的函数。我们表明，VDWH层层的滞后脱离是由大气泡的生长触发的。气泡生长发生是由于压力的浓度类似于骨折的开始。异质结构界面处的小气泡不会导致分层，因为它们比临界断裂长度小。我们提供了对VDWH的摩擦动力学和界面裂缝的见解。
2D van der Waals heterostructures (vdWH) can result in novel functionality that crucially depends on interfacial structure and disorder. Bubbles at the vdWH interface can modify the interfacial structure. We probe the dynamics of a bubble at the interface of a graphene-hBN vdWH by using it as the drumhead of a NEMS device because nanomechanical devices are exquisite sensors. For drums with different interfacial bubbles, we measure the evolution of the resonant frequency and spatial mode shape as a function of electrostatic pulling. We show that the hysteretic detachment of layers of vdWH is triggered by the growth of large bubbles. The bubble growth takes place due to the concentration of stress resembling the initiation of fracture. The small bubbles at the heterostructure interface do not result in delamination as they are smaller than a critical fracture length. We provide insight into frictional dynamics and interfacial fracture of vdWH.
