Nanostructure Formation and Evolution in Thin Films

在这个由分析和表面化学项目支持的研究项目中，爱荷华州立大学的詹姆斯·埃文斯教授和帕特里夏·蒂尔教授及其同事正在研究薄膜生长的原子水平机制。采用实验/计算相结合的方法，该团队正在研究金属在金属上的各向异性同外延生长，重点研究银在Ag（110）单晶表面上的生长。研究了吸附表面活性剂对薄膜生长机理和形貌的影响。变温扫描隧道显微镜、高分辨率低能电子衍射和动力学蒙特卡罗方法都被用来检查这些生长过程。这项工作的结果有助于在各种技术应用中定义和控制纳米结构的结构和稳定性。了解金属对金属生长的详细机制是爱荷华州立大学开展的这项研究项目的目标。实验和计算相结合的方法被用来检查各向异性生长，表面活性剂介导的生长，以及金属和石墨表面纳米结构的稳定性和形态。从这些研究中获得的信息影响了电子器件制造和纳米结构材料的技术。

In this research project supported by the Analytical and Surface Chemistry Program, Professors James Evans and Patricia Thiel and their coworkers at Iowa State University are examining the atomic level mechanisms of thin film growth. Using a combined experimental/computational approach, this team is investigating the anisotropic homoepitaxial growth of metals on metals, concentrating on the growth of silver on the Ag(110) single crystal surface. The effect of adsorbate surfactants on the growth mechanism and morphology of the thin film is also examined. Variable temperature scanning tunneling microscopy, high-resolution low energy electron diffraction, and kinetic Monte Carlo methods are all used to examine these growth processes. The results of this work help to define and control the structure and stability of nanostructures for various technological applications.Understanding the detailed mechanism of metal on metal growth is the goal of this research project carried out at Iowa State University. A combination of experimental and computational methods is used to examine anisotropic growth, surfactant mediated growth, and the stability and morphology of nanostructures on metal and graphite surfaces. Information obtained from these studies impacts technologies for electronic device fabrication and nanostructured materials.