负载碳纳米管的阻轧和摩擦各向异性
Hindered rolling and friction anisotropy in supported carbon nanotubes
摘要：
碳纳米管（CNT）以其优异的热、机械和电学性能而闻名。对于许多CNT应用，了解其摩擦性能是最重要的。然而，人们对单个纳米管与基底或尖端之间的摩擦力知之甚少。在这里，我们提出了一个相结合的理论和实验研究的摩擦力所遇到的纳米尺寸的尖端上的支持的多壁CNT沿平行或横向的CNT轴的方向滑动。令人惊讶的是，我们发现一个更高的摩擦系数在横向方向相比，平行方向。这种行为是解释了模拟显示，横向摩擦eldings一个软的“受阻滚动”的管和摩擦耗散是不存在的，或部分不存在的手性碳纳米管，当尖端平行于CNT轴滑动。我们的研究结果可以帮助开发更好的策略，大规模的CNT组装和表面上的排序。
英文摘要：
Carbon nanotubes (CNTs) are well known for their exceptional thermal, mechanical and electrical properties. For many CNT applications it is of the foremost importance to know their frictional properties. However, very little is known about the frictional forces between an individual nanotube and a substrate or tip. Here, we present a combined theoretical and experimental study of the frictional forces encountered by a nanosize tip sliding on top of a supported multiwall CNT along a direction parallel or transverse to the CNT axis. Surprisingly, we find a higher friction coefficient in the transverse direction compared with the parallel direction. This behaviour is explained by a simulation showing that transverse friction elicits a soft 'hindered rolling' of the tube and a frictional dissipation that is absent, or partially absent for chiral CNTs, when the tip slides parallel to the CNT axis. Our findings can help in developing better strategies for large-scale CNT assembling and sorting on a surface.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
