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理论纳米摩擦学中的一些主题

Some topics in theoretical nanofriction
课程网址: http://videolectures.net/slonano07_tosatti_ttn/  
主讲教师: Erio Tosatti
开课单位: 阿卜杜斯萨拉姆国际理论物理中心
开课时间: 2008-01-18
课程语种: 英语
中文简介:
正如由表面和界面而不是由体积决定的所有特性一样,当相互接触并相对移动的物体为纳米尺寸时,附着力和摩擦力的重要性会增加。在本次演讲中,我建议回顾一下我们小组中最近受纳米摩擦启发的主题和模型上所做的一些理论和模拟工作,其中包括:*一些由周期性但不相称的系统的滑动所确定的奇怪现象。 *高温和表面熔化对AFM尖端产生的摩擦的影响。 *预测了高速滑动同轴纳米管的负微分摩擦。 *扩散的弹道交叉预测了金纳米团簇在石墨上的摩擦滑移时间。
课程简介: As is natural for all properties determined by surfaces and interfaces rather than by bulk, adhesion and friction increase in importance when the objects that come into contact  and move relative to one another are nanosized. In this talk I propose to review some theory and simulation work recently done in our group on topics and models that are inspired by nanofriction. Among them are: * Some strange phenomena determined by the sliding of periodic but incommensurate systems. * The effect of high temperatures and surface melting on the friction felt by an AFM tip. * The negative differential friction predicted for high-speed sliding coaxial nanotubes. * The diffusive-ballistic crossover predicted for the frictional slip time of gold nanoclusters on graphite.
关 键 词: 纳米尺寸; 同轴纳米管; 摩擦滑移
课程来源: 视频讲座网
最后编审: 2019-09-21:cwx
阅读次数: 67