2D or 3D layered materials, such as graphene, graphite, and molybdenum disulfide, usually exhibit superlubricity properties when sliding occurs between the incommensurate interface lattices. This study reports the superlubricity between graphite and silica under ambient conditions, induced by the formation of multiple transferred graphene nanoflakes on the asperities of silica surfaces after the initial frictional sliding. The friction coefficient can be reduced to as low as 0.0003 with excellent robustness and is independent of the surface roughness, sliding velocities, and rotation angles. The superlubricity mechanism can be attributed to the extremely weak interaction and easy sliding between the transferred graphene nanoflakes and graphite in their incommensurate contact. This finding has important implications for developing approaches to achieve superlubricity of layered materials at the nanoscale by tribointeractions.

中文翻译：

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多重转移石墨烯纳米片诱导石墨的超润滑性

2D或3D层状材料，例如石墨烯、石墨和二硫化钼，当在不相称的界面晶格之间发生滑动时通常表现出超润滑性能。这项研究报告了在环境条件下石墨和二氧化硅之间的超润滑性，这是由初始摩擦滑动后在二氧化硅表面的粗糙度上形成多个转移的石墨烯纳米片引起的。摩擦系数可低至0.0003，具有出色的鲁棒性，并且与表面粗糙度、滑动速度和旋转角度无关。超润滑机制可归因于转移的石墨烯纳米片和石墨之间在不相称接触中的极弱相互作用和容易滑动。这一发现对于开发通过摩擦相互作用实现纳米级层状材料超润滑的方法具有重要意义。