标题： 通过横向力显微镜解密二维SnSe和SnSe$_2$的纳米尺度摩擦特性 显示英文标题

标题： Deciphering the Nanoscale Frictional Properties of Two-Dimensional SnSe and SnSe$_2$ with Lateral Force Microscopy

摘要： 在本研究中，我们采用了侧向力显微镜，这是一种原子力显微镜中的专门技术，以探索二维SnSe和SnSe$_2$层的纳米尺度摩擦特性，并将这些结果与石墨烯进行了比较，石墨烯是一种常用的固体润滑剂。 我们的结果表明，SnSe和SnSe2层相比具有相似厚度的石墨烯表现出更优异的润滑性能，其中SnSe$_2$的摩擦水平低至三倍。 与SnSe相比，SnSe$_2$中观察到的较低摩擦进一步通过广泛的密度泛函理论（DFT）计算得到了证实，确认了其增强润滑行为的固有材料特性。 显示英文摘要

摘要： In this study, we employed lateral force microscopy, a specialized technique within atomic force microscopy, to explore the nanoscale frictional properties of 2D SnSe and SnSe$_2$ layers, and we compared these findings with graphene, a commonly used solid lubricant. Our results revealed that SnSe and SnSe2 layers exhibited superior lubricative performance compared to graphene with similar thickness, with SnSe$_2$ demonstrating friction levels up to three times lower. This lower friction observed in SnSe$_2$, as compared to SnSe, was further substantiated by extensive Density Functional Theory (DFT) calculations, confirming the intrinsic material properties contributing to their enhanced lubricative behavior.