Spatial Organization in Epitaxial Thin Films and Chemisorbed Layers: Manipulation of Nano- and Meso-scale Structure on Metal Substrates

该研究项目由爱荷华州立大学的实验表面科学家Pat Thiel和数学家/建模专家James Evans共同完成。这项工作是由分析和表面化学计划支持的，研究金属薄膜的生长和薄膜的空间组织。本课题研究了表面活性剂对异质外延生长、双金属和准晶衬底上薄膜生长的影响，以及金属衬底上化学吸附层的有序排列。来自扫描探针显微镜和高分辨率电子衍射的实验信息与生长过程的理论建模以及几何结构和薄膜形态弛豫的计算相结合。这项基础工作的信息有助于理解电子材料的加工和纳米材料的合成和制备。为了理解构成许多重要技术基础的生长过程，包括电子器件制备、催化形成和纳米材料合成，必须获得关于模型系统生长和形态变化的基本信息。埃文斯和泰尔在爱荷华州立大学的合作研究提供了关于生长过程的详细实验信息，并对生长和松弛过程进行了最先进的建模。在分析和表面化学项目的支持下，这项合作正在使用这些方法研究表面活性剂、双金属和准晶体系统以及有序化学吸附覆盖层的影响。

AbstractCHE-0414378Evans/Iowa StateThis research project, carried out at Iowa State University, is a collaboration between and experimental surface scientist, Pat Thiel, and a mathematician/modeling expert, James Evans. The work, which is supported by the Analytical and Surface Chemistry Program, addresses metallic thin film growth and spatial organization of thin films. The effect of surfactants on heteroepitaxial growth, thin film growth on bimetallic and quasicrystalline substrates, and the ordering of chemisorbed layers on metal substrates are all addressed in this research project. Experimental information from scanning probe microscopy and high resolution electron diffraction is combined with theoretical modeling of the growth process and calculations of geometric structures and relaxation of thin film morphologies. Information from this fundamental work helps to understand electronic materials processing and nanomaterials synthesis and preparation. In order to understand the growth processes that form the basis of many important technologies, including electronic device preparation, catalysis formation, and nanomaterials synthesis, fundamental information about the growth and morphological changes of model systems must be obtained. This research collaboration between Evans and Thiel at Iowa State University provides detailed experimental information about the growth process with state of the art modeling of the growth and relaxation processes. With the support of the Analytical and Surface Chemistry Program, this collaboration is examining the effects of surfactants, bimetallic and quasicrystal systems, and ordered chemisorbed overlayers using these approaches.