Collaborative Research: Experimental and Multi-Scale Modeling Investigation of Atomic Lattice Stick-Slip Friction

提案编号0409449提案标题：协作性研究：原子晶格粘滑摩擦的实验和多尺度建模研究西北大学威斯康星大学麦迪逊分校R.W.Carick纳米技术正在引领其结构和功能在原子尺度上被控制的材料和器件的快速发展，并且许多这样的器件涉及滑动界面。这项工作的学术价值将是确定原子粘滑的根本原因和影响，这是纳米级滑动的关键特征。我们将使用原子力显微镜，对表征良好的样品和尖端进行分析。通过协作，实验将耦合到多尺度建模，该模型考虑了实验中使用的相同材料接触中的变形场。我们将讨论可公度性、速度和温度相关性、振动特性的作用以及通过控制粘滑运动显著减少摩擦的可能性等关键问题。更广泛的教育和社会影响涉及综合教育和外展努力，利用我们每个机构的高效计划。

Proposal Number 0409449 Proposal Title Collaborative Research: Experimental and Multi-Scale Modeling Investigation of Atomic Lattice Stick-Slip Friction R.W. Carpick, University of Wisconsin-MadisonWing Kam Liu, Northwestern UniversityNanotechnology is leading to the rapid development of materials and devices whose structure and function are controlled at the atomic scale, and many such devices involve sliding interfaces. The intellectual merit of this work will be to determine the fundamental causes and effects of atomic stick-slip, which is a key feature of nanoscale sliding. We will use atomic force microscopy with well-characterized samples and tips. Through collaboration, experiments will be coupled to multiscale modeling that takes into account the deformation field in the contact for the same materials used in the experiment. We will address the key questions of commensurability, velocity and temperature dependence, the role of the vibrational properties, and the possibility of dramatically reducing friction by controlling stick-slip motion. The broader educational and societal impact involves an integrated education and outreach effort that leverages highly effective programs at each of our institutions.