Two-dimensional heterostructures are excellent platforms to realize twist-angle-independent ultra-low friction due to their weak interlayer van der Waals interactions and natural lattice mismatch. However, for finite-size interfaces, the effect of domain edges on the friction process remains unclear. Here we report the superlubricity phenomenon and the edge-pinning effect at MoS₂/graphite and MoS₂/hexagonal boron nitride van der Waals heterostructure interfaces. We found that the friction coefficients of these heterostructures are below 10⁻⁶. Molecular dynamics simulations corroborate the experiments, which highlights the contribution of edges and interface steps to friction forces. Our experiments and simulations provide more information on the sliding mechanism of finite low-dimensional structures, which is vital to understand the friction process of laminar solid lubricants.

二维异质结构是实现与扭转角无关的超低摩擦的绝佳平台，因为它们具有弱的层间范德华相互作用和自然晶格失配。然而，对于有限尺寸的界面，域边缘对摩擦过程的影响仍不清楚。在这里，我们报告了在 MoS ₂ /石墨和 MoS ₂ /六方氮化硼范德华异质结构界面处的超润滑现象和边缘钉扎效应。我们发现这些异质结构的摩擦系数低于 10 ^-6. 分子动力学模拟证实了实验，突出了边缘和界面台阶对摩擦力的贡献。我们的实验和模拟提供了有关有限低维结构滑动机制的更多信息，这对于理解层状固体润滑剂的摩擦过程至关重要。