SIMULATION FOR NANOMANIPULATOR

我们正在研究碳的机械性能和 被取代的纳米管。这些纳米级的结构已经被 是自然界中已知的最坚硬的材料，并展示 卓越的柔韧性和抗折性。这个 纳米操纵器系统是我们研究中不可缺少的，它有 作为封面故事出现在《自然》杂志上(1997年10月10日)。我们目前的情况 研究范围将扩大到包括材料的机械性能 非碳纳米管，因为我们有内部供应的硅和 金属纳米管，由OTO周的同事生产 物理系。我们对表面也非常感兴趣 纳米管作为纳米接触模型体系的性质 力学和摩擦力。我们进行了广泛的操作 纳米管并观察到运动物体的正则行为 接触：滑动、粘滑，最后是滚动。后者是 这是在纳米尺度上首次观察到这种现象。 我们目前正在研究这些效应的底物依赖关系 并试图观察摩擦的原子尺度特征。

We are studying the mechanical properties of carbon and substituted nanotubes. These nanometer scale structures have been shown to be the stiffest materials known in nature and to display remarkable flexibility and resistance to fracture. The nanoManipulator system was indispensable in our studies, which have appeared as a cover story in Nature (Oct. 10, 1997). Our current studies will broaden to include the mechanical properties of non-carbon nanotubes, as we have an in-house supply of silicon and metallic nanotubes as produced by a colleague, Otto Zhou, of the physics department. We are also very interested in the surface properties of nanotubes as model systems for nanometer-scale contact mechanics and friction. We have performed extensive manipulations of nanotubes and observed the canonical behavior of moving objects in contact: sliding, stick-slip and, finally, rolling. The latter is the first observation of this phenomena at the nanometer length scale. We are currently s tudying the substrate dependencies of these effects and attempting to observe the atomic-scale signatures of friction.