论文标题
插入导致摩擦对化学掺杂的MOS_ {2}的反层依赖性
Intercalation Leads to Inverse Layer Dependence of Friction on Chemically Doped MoS_{2}
论文作者
论文摘要
我们介绍了基于原子 - 微观镜检查的摩擦测量结果的结果，该测量在二硫化钼（MOS2）上。与在二维（2D）材料上增加摩擦数量减少的广泛观察与摩擦数量的降低形成鲜明对比，重新掺杂的MOS2上的摩擦表现出异常的摩擦，即对层数的逆依赖性。拉曼光谱测量与从头算的计算相结合，揭示了重新插入的签名。计算表明，平面外刚度的增加与层的数量成反比，这是这种非凡的观察结果背后的物理机制，揭示了2D材料的冰球的独特状态。
We present results of atomic-force-microscopy-based friction measurements on Re-doped molybdenum disulfide (MoS2). In stark contrast to the widespread observation of decreasing friction with increasing number of layers on two-dimensional (2D) materials, friction on Re-doped MoS2 exhibits an anomalous, i.e., inverse dependence on the number of layers. Raman spectroscopy measurements combined with ab initio calculations reveal signatures of Re intercalation. Calculations suggest an increase in out-of-plane stiffness that inversely correlates with the number of layers as the physical mechanism behind this remarkable observation, revealing a distinctive regime of puckering for 2D materials.
