RUI/Collaborative Research: The Molecular Origins of Friction - A Study Across Velocity Regimes of Phosphonate Monolayers on Alternative MEMS-Type Surfaces

RUI/合作研究：摩擦的分子起源 - 替代 MEMS 型表面上磷酸盐单分子层速度范围的研究

• 批准号: 0758330
• 负责人: Brian Borovsky
• 金额: $ 11.64万
• 依托单位: Saint Olaf College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0758330&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; Molecular; Origins

The purpose of this collaborative project is to combine the resources of three institutions to study the frictional properties of molecularly-thin films for a wide range of sliding speeds. These films, known as self-assembled monolayers (SAMs), will be composed of phosphonic acid molecules, long-chain carbon-based molecules that include phosphorous. These SAMs will be attached to oxidized metal surfaces and provide a model system for exploring how friction depends on molecular structure and the surface to which the molecules are attached. With intensive involvement of undergraduate students, Prof. Erin Flater at Luther College and Prof. Brian Borovsky at St. Olaf College will compare frictional measurements performed using two distinct micro/nanoscale friction measuring devices, an atomic force microscope and an integrated nanoindenter - quartz microbalance system, respectively. Prof. W. Robert Ashurst at Auburn University will prepare the samples in advance, to create identical frictional interfaces for study at Luther and St. Olaf. Understanding the frictional properties of SAMs provides information about the nature of friction in general, and the results of this collaborative research program will help bridge the scientific and technical areas of friction research. As mechanical devices are made smaller in size, their functionality is limited by surface phenomena, such as friction and adhesion. In this way, low friction phosphonate SAMs may provide an alternative pathway for the development of microscale devices. This project exemplifies the dedication of St. Olaf College and Luther College to provide undergraduate students with access to mentored research opportunities and modern instrumentation. The techniques developed will be incorporated into existing advanced laboratory courses, maximizing the educational impact of the collaborators? research programs.

这个协作项目的目的是结合三个机构的资源，以研究分子薄膜的摩擦特性，以用于广泛的滑动速度。这些膜被称为自组装单层（SAM），将由磷酸分子，包括磷酸化的长链碳基分子组成。这些SAM将连接到氧化的金属表面上，并提供一个模型系统，用于探索摩擦如何取决于分子结构和分子附着的表面。随着本科生的密切参与，路德学院的Erin Flater教授和圣奥拉夫学院的Brian Borovsky教授将比较使用两种不同的微型/纳米级摩擦测量设备，一个原子力显微镜和集成的Nanoindenter -Quartenter -quartenter -Quartz Microbalance系统进行的摩擦测量。奥本大学的W. Robert Ashurst教授将提前准备样品，以在路德和圣奥拉夫创建相同的摩擦界面。了解SAMS的摩擦特性提供了有关一般摩擦本质的信息，该协作研究计划的结果将有助于弥合摩擦研究的科学和技术领域。随着机械设备的尺寸较小，其功能受到表面现象的限制，例如摩擦和粘附。这样，低摩擦磷酸盐SAM可以为显微镜设备的开发提供替代途径。该项目体现了圣奥拉夫学院和路德学院为本科生提供指导的研究机会和现代仪器的奉献精神。开发的技术将纳入现有的高级实验室课程中，从而最大程度地提高合作者的教育影响？研究计划。