In Situ Atomic-Scale Reaction Kinetics Under Tribological Conditions

摩擦条件下原位原子级反应动力学

• 批准号: 9634374
• 负责人: Jacqueline Krim
• 金额: $ 5.63万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9634374&HistoricalAwards=false
• 关键词: Situ; Atomic; Scale; Reaction; Kinetics

9634374 Krim Under an SGER award an attempt will be made to determine the magnitude of the mechanical stimulation in tribochemical events. Single layers of reagent gas molecules will be adsorbed on the metallic sample surface and the surface will then be rubbed by the tip of an atomic force microscope (AFM) in an oscillating mode, simulating a tribological system. Changes in the nature of the surface layer will be indicated by the quartz crystal microbalance in which the sample is mounted. The nature of the reaction molecule can then be determined by imaging it with the AFM. The initial systems selected for testing (ethylene/Pt and oxygen/Ag) have been very well characterized as far as their thermal reaction kinetics are concerned. This should allow the mechanical component of the tribochemical reaction to be determined from the results. ***

9634374 Krim根据SGER奖，将尝试确定摩擦化学事件中机械刺激的幅度。 单层试剂气体分子将吸附在金属样品表面上，然后该表面将由原子力显微镜（AFM）的尖端以振荡模式摩擦，模拟摩擦学系统。 表面层性质的变化将由安装样品的石英晶体微量天平指示。 反应分子的性质然后可以通过用AFM对其成像来确定。 就其热反应动力学而言，选择用于测试的初始系统（乙烯/Pt和氧/Ag）已经被很好地表征。 这应该允许从结果确定摩擦化学反应的机械分量。 ***