Collaborative Research: Dissipation in Atomic-Scale Friction - A Coordinated Experimental and Modeling Study

本研究的目的是了解原子粘滑摩擦现象，包括新发现的超低能量耗散的稳定滑动转变。这项研究将通过密切协调的实验和建模工作来进行。实验将使用先进的原子力显微镜（AFM）和定义良好的样品和尖端来测量原子尺度的摩擦。这将协同耦合到原子建模工作，该工作将采用物理代表性的潜在模型和加速分子动力学（MD）来匹配实验的时间尺度。这项研究将在一个新的层次上提供对原子尺度摩擦和能量耗散的理解。它还将有助于提供新的、基本的、广泛适用的原则，以控制纳米级器件的滑动运动，如纳米机电系统（NEMS）和超高密度基于探针的数据存储设备。该项目将利用普渡大学和宾夕法尼亚大学的高效教育推广项目。具体的优先事项包括托管？教师的研究经验？开发基于AFM的多用途演示模块，并积极参与国际协作网络社区。

The objective of this research is to understand the phenomenon of atomic stick-slip friction, including the newly discovered transition to stable sliding with ultralow energy dissipation. The research will be conducted through a closely-coordinated experimental and modeling effort. The experiments will use advanced atomic force microscopy (AFM) with well-defined samples and tips to measure atomic-scale friction. This will be synergistically coupled to an atomistic modeling effort that will employ physically representative potential models and accelerated molecular dynamics (MD) to match the time scale of the experiments. This research will provide an understanding of atomic-scale friction and energy dissipation at a new level of insight. It will also help to provide new, fundamental, and widely applicable principles that govern the sliding motion of nanoscale devices such as nano-electromechanical systems (NEMS) and ultrahigh density probe-based data storage devices. The project will leverage highly effective educational outreach programs at both Purdue University and the University of Pennsylvania. Specific priorities include hosting ?research experience for teachers? fellows, development of multi-purpose demonstration modules based on AFM, and active participation in international collaborative cyber-network communities.