SIMULATION FOR NANOMANIPULATOR

我们正在研究碳的机械性能， 取代的纳米管。 这些纳米尺度的结构已经被 是自然界中已知的最坚硬的材料， 具有良好的柔韧性和抗断裂性。 的 在我们的研究中，纳米机械手系统是必不可少的， 作为封面故事出现在《自然》杂志上（1997年10月10日）。 我们目前 研究范围将扩大到包括以下材料的机械性能 非碳纳米管，因为我们有内部供应的硅， 金属纳米管，由一位同事，奥托周， 物理系。 我们对地表也很感兴趣 纳米管作为纳米尺度接触模型系统的性质 力学和摩擦 我们已经进行了广泛的操作， 纳米管，并观察到移动物体的典型行为， 接触：滑动，粘滑，最后，滚动。 后者是 首次在纳米尺度上观察到这种现象。 我们目前正在研究这些效应的底物依赖性 并试图观察原子尺度的摩擦特征。

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.