In Situ Atomic-Scale Reaction Kinetics Under Tribological Conditions

9634374 Krim根据SGER奖，将尝试确定摩擦化学事件中机械刺激的大小。单层试剂气体分子将被吸附在金属样品表面，然后原子力显微镜（AFM）的尖端将以振荡模式摩擦表面，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天平表示。反应分子的性质可以通过原子力显微镜成像来确定。选择用于测试的初始体系（乙烯/Pt和氧/Ag）就其热反应动力学而言已经很好地表征了。这将允许从结果中确定摩擦化学反应的机械成分。* * *

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. ***