Ion Scattering Studies of Surface Structure and Growth

表面结构和生长的离子散射研究

• 批准号: 9408578
• 负责人: Torgny Gustafsson
• 金额: $ 33万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9408578&HistoricalAwards=false
• 关键词: Ion; Scattering; Studies; Surface; Structure

9408578 Gustafsson The structure of clean and adsorbate covered surfaces using medium energy ion scattering (MEIS) and scanning tunneling microscopic (STM) will be determined. The surface vibrational amplitudes of well ordered metal surfaces of silver and copper will be measured in the anharmonic regime and correlated with structural changes. Further studies will focus on systems that undergo displacive surface phase transitions and metal overlayers on oxides. An atomistic understanding of these effects can have a beneficial impact on a large number of areas of applied nature, such as magnetic films, chemically passive coating, tribology, and bimetallic catalysts. % % % % The goal of these studies is to determine the geometric and vibrational structure of clean and adsorbate covered surfaces. Our main experimental technique is medium energy ion scattering, a very powerful, but not widely available, quantitative method for the determination of surface structure. The specific systems to be studied include low index surfaces of silver and copper, as well as metal overlayers on oxide surfaces. The experiments will contribute towards an understanding of emerging technologies, like bimetallic catalysts, optical and magnetic films, chemically passive coatings and tribology. ***

小行星9408578 将使用中能离子散射（MEIS）和扫描隧道显微镜（STM）确定清洁和吸附物覆盖的表面的结构。 将在非谐范围内测量银和铜的良好有序金属表面的表面振动振幅，并将其与结构变化相关联。 进一步的研究将集中在系统进行置换表面相变和金属氧化物上的覆盖层。 对这些效应的原子理解可以对大量应用性质的领域产生有益的影响，例如磁性薄膜，化学钝化涂层，摩擦学和催化剂。 % % % % 这些研究的目的是确定清洁和吸附物覆盖表面的几何和振动结构。 我们的主要实验技术是中等能量离子散射，一个非常强大的，但不广泛使用，定量测定表面结构的方法。 待研究的具体系统包括银和铜的低折射率表面，以及氧化物表面上的金属覆盖层。 这些实验将有助于了解新兴技术，如生物催化剂，光学和磁性薄膜，化学钝化涂层和摩擦学。 ***