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

合作研究：原子尺度摩擦耗散——协调的实验和建模研究

• 批准号: 0800154
• 负责人: Robert Carpick
• 金额: $ 17.31万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-15 至 2011-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800154&HistoricalAwards=false
• 关键词: Collaborative; Research; Dissipation; Atomic; Scale

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.

这项研究的目的是了解原子粘滑摩擦现象，包括新发现的过渡到稳定的滑动超低能量耗散。这项研究将通过密切协调的实验和建模工作进行。这些实验将使用先进的原子力显微镜（AFM）和定义明确的样品和尖端来测量原子尺度的摩擦。这将协同耦合到一个原子建模工作，将采用物理代表性的潜在模型和加速分子动力学（MD），以匹配实验的时间尺度。这项研究将在一个新的水平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，管理纳米器件，如纳米机电系统（NEMS）和基于密度探针的数据存储设备的滑动运动。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计划。具体的优先事项包括托管？教师的研究经验？研究员，基于原子力显微镜的多用途演示模块的开发，并积极参与国际合作网络社区。