Ambient Temperature Measurements of Surface Diffusivity and Surface Free Energy Using the Scanning Tunneling Microscope

金属的表面扩散系数和表面自由能是 成核等现象中的重要物理量 以及生长、腐蚀和断裂。 这些参数值 适用于环境温度行为的是基于线性 高温测量的外推。 这个程序 研究了一种新的测量技术，用于直接观察 表面迁移率使用扫描隧道显微镜。 等 测量需要在非常好表征的 考虑到表面偏析和 电解质组合物。 考虑温度依赖性 的表面参数被认为是高风险的，因为它需要 新的扫描隧道显微镜技术。

Surface diffusivity and surface free energy of metals are important physical quantities in phenomena such as nucleation and growth, corrosion, and fracture. Values of these parameters appropriate for ambient temperature behavior are based on linear extrapolations of high temperature measurements. This program examines a new measurement technique for direct observation of surface mobilities using the scanning tunneling microscope. Such measurements need to be done on extremely well characterized surfaces, taking into account surface segregation and effect of electrolyte composition. Consideration of temperature dependence of the surface parameters is considered high risk as it requires new scanning tunneling microscopy techniques.