石墨烯纳米带在金表面的超润滑性
Superlubricity of Graphene Nanoribbons on Gold Surfaces
摘要：
摩擦消失的状态称为超润滑性，在节能和延长设备寿命方面具有重要的应用。用原子力显微镜检测到的超润滑性出现在像在表面滑动大石墨薄片或金纳米团簇的例子中。然而，由于缺乏可控的纳米接触，对行为的起源知之甚少。我们证明了石墨烯纳米带的超润滑性时，与联合实验和计算的方法在金上滑动。原子上定义良好的接触使我们能够追踪超润滑性的起源，解开边缘，表面重建和带状弹性所扮演的角色。我们的研究结果铺平了道路，以实现无摩擦涂层的超润滑性的规模。
英文摘要：
The state of vanishing friction known as superlubricity has important applications for energy saving and increasing the lifetime of devices. Superlubricity detected with atomic force microscopy appears in examples like sliding large graphite flakes or gold nanoclusters across surfaces. However, the origin of the behavior is poorly understood due to the lack of a controllable nano-contact. We demonstrate graphene nanoribbons superlubricity when sliding on gold with a joint experimental and computational approach. The atomically well-defined contact allows us to trace the origin of superlubricity, unravelling the role played by edges, surface reconstruction and ribbon elasticity. Our results pave the way to the scale-up of superlubricity toward the realization of frictionless coatings.
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