Metal oxide surfaces studied with low energy alkali ion charge exchange

通过低能碱离子电荷交换研究金属氧化物表面

• 批准号: 1012987
• 负责人: Jory Yarmoff
• 金额: $ 43万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1012987&HistoricalAwards=false
• 关键词: Metal; oxide; surfaces; studied; low

With this award, the Chemical Structure, Dynamics, and Mechanisms Program supports Professor Jory A. Yarmoff of the University of California-Riverside in a project involving the use of low energy alkali ion scattering to characterize the surface properties of metal oxides and related materials. Energy spectra of the projectiles that scatter from the surface provide a measure of the elemental composition at the surface, while the fraction of ions neutralized and their angular distribution provide information on the inhomogeneous local electrostatic potential. The research will utilize other surface analysis tools, such as scanning probe microscopy and photoelectron spectroscopy, to enable a complete characterization of the materials under investigation. The systems to be studied include clean metal oxide surfaces, surfaces that have intentional oxygen vacancy defects, and atoms and molecules adsorbed on the oxide surfaces.This work will expand basic knowledge of ion-surface charge exchange for an important class of materials that are ubiquitous in nature and technology, as well as enable the development of new analytical methods. These experiments will impact applications in electronics, catalysis, photochemistry and other technologies that rely on the electronic and chemical properties of metal oxides. The project will contribute to the training of graduate and undergraduate students through hands-on laboratory experience in an important area of modern research. Outreach efforts will impact local high school teachers through a summer program that includes actual laboratory experience.

有了这个奖项，化学结构，动力学和机制计划支持教授乔里A。加州大学河滨分校的Yarmoff参与了一个项目，该项目涉及使用低能碱离子散射来表征金属氧化物和相关材料的表面性质。从表面散射的射弹的能谱提供了表面处的元素组成的测量，而中和的离子的分数及其角分布提供了关于不均匀的局部静电势的信息。该研究将利用其他表面分析工具，如扫描探针显微镜和光电子能谱，以实现对所研究材料的完整表征。研究对象包括清洁的金属氧化物表面、故意存在氧空位缺陷的表面以及吸附在氧化物表面上的原子和分子。这项工作将扩大对自然界和技术中普遍存在的一类重要材料的离子表面电荷交换的基本知识，并开发新的分析方法。这些实验将影响电子、催化、光化学和其他依赖金属氧化物电子和化学性质的技术的应用。该项目将通过在现代研究的一个重要领域的实验室实践经验，为研究生和本科生的培训做出贡献。外联工作将通过一个包括实际实验室经验的暑期项目影响当地高中教师。