U.S.- Czech Materials Research on Dynamics of Adatoms and Nanostructure Formation

美国-捷克关于吸附原子动力学和纳米结构形成的材料研究

• 批准号: 0308595
• 负责人: Michael Tringides
• 金额: --
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2009-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0308595&HistoricalAwards=false
• 关键词: U.S.; Czech; Materials; Research; Dynamics

The goal of this U.S.-Czech materials research project between Michael Tringides of Iowa State University and Zdenek Chvoj of the Institute of Physics, Academy of Sciences, CR, is to study adatom dynamics and the role of surface diffusion in epitaxial growth. This includes atomic diffusion mechanisms on (111) surfaces, using primarily silver, Ag, as a model system. Specifically the researchers intend to examine interlayer diffusion in epitaxy, the role of adatom-substrate interactions, and the kinetics controlling the formation of uniform height metal islands on semiconductor surfaces. Experimental work will be done by the Ames group using high-resolution electron defraction and scanning tunneling microscopy to obtain atomic images of the growth structures. Czech partners will address theoretical aspects of the joint project using analytical models and Monte Carlo simulations. Results are expected to refine the basic context for understanding and manipulating the complex dynamics and growth modes of metal adatoms on metal and semiconductor surfaces. Success would enhance our ability to grow and control the formation of nanostructures, with potential applications in the field of film growth. This materials research project fulfills the program objective of advancing scientific knowledge by enabling experts in the United States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence. Broader impacts include the introduction of U.S. and Czech students to the international research community through work at partner institutions and direct involvement in the project's advanced experiments and modeling techniques.

爱荷华州立大学的 Michael Tringides 和捷克共和国科学院物理研究所的 Zdenek Chvoj 共同开展的这个美国-捷克材料研究项目的目标是研究吸附原子动力学和表面扩散在外延生长中的作用。这包括 (111) 表面上的原子扩散机制，主要使用银 Ag 作为模型系统。 具体来说，研究人员打算研究外延中的层间扩散、吸附原子-衬底相互作用的作用，以及控制半导体表面上均匀高度金属岛形成的动力学。艾姆斯小组将使用高分辨率电子衍射和扫描隧道显微镜进行实验工作，以获得生长结构的原子图像。 捷克合作伙伴将使用分析模型和蒙特卡罗模拟来解决联合项目的理论问题。 预计结果将完善理解和操纵金属和半导体表面上金属吸附原子的复杂动力学和生长模式的基本背景。 成功将增强我们生长和控制纳米结构形成的能力，并在薄膜生长领域具有潜在的应用。 该材料研究项目通过使美国和中欧的专家能够结合互补的人才并在共同感兴趣和能力强的领域共享研究资源，实现了推进科学知识的计划目标。更广泛的影响包括通过在合作机构的工作以及直接参与该项目的先进实验和建模技术，将美国和捷克的学生引入国际研究界。