Stranski-Krastanov Growth in a Binary Eutectic

在这个更新项目的努力中，对二元共晶体系中stranski - krstanov生长的结构、热力学和动力学进行了研究。我们感兴趣的主要领域之一是了解当颗粒尺寸从大（体相图适用）减小到小（表面自由能等因素可能导致共晶温度降低）时，系统的行为。与此研究同时进行的是确定表面结构的“直接方法”。这里的目标是提供一个通用的代码，可以免费使用，从头算，从透射电子衍射或表面x射线衍射数据中求解三维表面结构。程序中增加的一个新领域是重构表面的电荷转移，原则上应该使用透射电子衍射来检测和量化。另一个领域是进动电子衍射照相机，它可能成为未来利用透射电子衍射测定结构的一个非常重要的工具。随着电子器件尺寸的不断减小，金属材料没有理由遵循传统的块状特性行为。本研究采用经典的冶金学、表面科学和小颗粒科学来更好地了解金属薄膜的性质和行为

0075834MarksIn this renewal project effort, research into the structural aspects, thermodynamics and kinetics of Stranski-Krastanov growth in a binary eutectic system is performed. One of the primary areas of interest is to understand how such a system behaves as the particle size decreases from large, where the bulk phase diagram is applicable, to small where terms such as the surface free energy may lead to depression of the eutectic temperature. Parallel with this research, work on 'Direct Methods' for determining surface structures is performed. The target here is to provide a general code that is freely available to solve, ab-initio, three-dimensional surface structures from transmission electron diffraction or surface x-ray diffraction data. A new area added to the program is charge-transfer at reconstructed surfaces which should in principle be detectable and quantifiable using transmission electron diffraction. Another area is a precession electron diffraction camera, which could become a very important tool in the future for determining structures using transmission electron diffraction. %%%As dimensions continue to decrease in electronic devices, there is no reason why metallic materials should follow the traditional bulk property behavior. This research employs classic metallurgy, surface science, and small particle science to better understand the properties and behavior of thin metallic films.***