Defect Mediated Thin-Film Growth

缺陷介导的薄膜生长

• 批准号: 9510663
• 负责人: Karl Sieradzki
• 金额: $ 32.68万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-03-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510663&HistoricalAwards=false
• 关键词: Defect; Mediated; Thin; Film; Growth

9510663 Sieradzki This research examines issues related to the role of defect interactions in determining thin metal film growth modes. The objective is to learn how to manipulate growth parameters such that layer-by-layer growth becomes the kinetically preferred growth mode. Growth mode mechanisms are examined using combined experimental, simulation, and theoretical approaches. Electrodeposition experiments are performed using in situ scanning tunneling microscopy in order to observe the details of the growth mode transition at the atomic level. Metal-on-metal heteroepitaxial systems studied include silver/gold, copper/gold, and silver/copper. These systems permit a determination of the role of misfit in the growth mode transition. The layer-by-layer growth mode is extended into the multilayer regime by employing modifications of the electrodeposition system. Monte Carlo simulations using Embedded Atom Method potentials are performed to determine the effects of defect interactions on adatom cluster diffusivities. %%% This research has important materials implications since the layer-by-layer growth mode is desired for many important engineering applications. ***

9510663 Sieradzki 这项研究探讨了与缺陷相互作用在确定金属薄膜生长模式中的作用相关的问题。 目标是学习如何操纵生长参数，使逐层生长成为动力学上优选的生长模式。 使用实验、模拟和理论相结合的方法来研究生长模式机制。 使用原位扫描隧道显微镜进行电沉积实验，以便在原子水平上观察生长模式转变的细节。 研究的金属对金属异质外延系统包括银/金、铜/金和银/铜。 这些系统可以确定失配在增长模式转变中的作用。 通过采用电沉积系统的改进，逐层生长模式被扩展到多层区域。 使用嵌入式原子方法势进行蒙特卡罗模拟以确定缺陷相互作用对吸附原子团簇扩散率的影响。 %%% 这项研究具有重要的材料意义，因为许多重要的工程应用需要逐层生长模式。 ***