Faculty Awards for Women Scientists and Engineers

女科学家和工程师学院奖

• 批准号: 9022961
• 负责人: Barbara Cooper
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-11-01 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022961&HistoricalAwards=false
• 关键词: Faculty; Awards; Women; Scientists; Engineers

The NSF Faculty Awards for Women Scientists and Engineers recognizes the high quality of the awardee's record in teaching and scholarship, as well as potential research, the academic profession, and the education of future scientists and engineers. Dr. Cooper's research under this award is directed at understanding the interactions of energetic ion beams with clean and adsorbate- covered single crystal metal surfaces. The dynamics of hyperthermal ion-surface scattering (incident energies below 500 eV) are of fundamental interest because it is in the hyperthermal energy regime that the transition occurs from thermal scattering,in which the ion interacts simultaneously with the entire surface to keV scattering, where the ion undergoes a series of sequential binary collisions with individual surface atoms. Hyperthermal scattering dynamics are also of practical importance since this energy regime is used in technological applications such as reactive ion etching and ion beam assisted epitaxy. To study these dynamics, well-characterized ion beams are scattered from clean and adsorbate-covered metal surfaces. Particular emphasis is placed on understanding aspects of the scattering dynamics, such as energy transfer to the surface and particle trapping, and on understanding mechanisms of ion-surface charge transfer. The initial studies will use alkali ion beams since the relative simplicity of alkali ion-surface reactions permits detailed modeling of the scattering and charge transfer dynamics. Scattering dynamics studies are currently underway for Na+ scattering from Cu(001), and will be extended to other alkalis and to other beam species, such as oxygen and nitrogen. Investigations to determine the mechanisms of ion-surface charge transfer are currently underway for incident Li+, Na+, and K+. They will be extended to other incident species, in particular atomic and molecular oxygen. A probe that is complementary to ion scattering for studying local atomic and electronic surface properties is the scanning tunneling microscope (STM). STM will be used in ultra high vacuum to study tunneling mechanisms on metal surfaces, the effect of adsorbates on the electronic structure at metal surfaces, and diffusion on metal surfaces.

美国国家科学基金会女科学家和工程师奖 承认获奖者在教学方面的高质量记录， 奖学金，以及潜在的研究，学术 专业，以及未来科学家和工程师的教育。 库珀博士在该奖项下的研究旨在了解 高能离子束与清洁和吸附物的相互作用- 覆盖单晶金属表面。 超热离子表面散射的动力学（入射 低于500 eV的能量）是基本的兴趣，因为它是在 转变发生的超热能区 热散射，其中离子同时与 整个表面的keV散射，其中离子经历 单个表面的二元连续碰撞系列 原子的超热散射动力学也具有实用价值 重要性，因为这种能源制度是用于技术 例如反应离子蚀刻和离子束辅助 外延生长为了研究这些动力学， 从干净的和吸附剂覆盖的金属表面散射。 特别强调的是理解的方面， 散射动力学，如能量转移到表面， 粒子捕获，并了解离子表面的机制 电荷转移最初的研究将使用碱离子束 由于碱离子表面反应相对简单， 允许散射和电荷转移的详细建模 动力学 目前正在进行Na+的散射动力学研究 从Cu（001）散射，并将扩展到其他碱金属， 到其它束种类，例如氧和氮。调查 为了确定离子表面电荷转移的机制， 目前正在处理Li+、Na+和K+事件。他们将 扩展到其他入射粒子，特别是原子和 分子氧 一种与离子散射互补的探针， 局部原子和电子表面性质是扫描 隧道显微镜（STM）。STM将用于超高真空 为了研究金属表面的隧穿机制， 吸附在金属表面的电子结构上，和 金属表面的扩散。