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

金属的表面扩散率和表面自由能是研究金属成核生长、腐蚀和断裂等现象的重要物理量。这些参数的值适合于环境温度的行为是基于高温测量的线性外推。这个程序检查了使用扫描隧道显微镜直接观察表面移动的一种新的测量技术。这样的测量需要在极好表征的表面上进行，考虑到表面偏析和电解质组成的影响。考虑表面参数的温度依赖性被认为是高风险的，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.