Stressed-Induced Nanopatterning of Surface Reactions on Metal Oxide Surfaces

技术描述：本项目研究使用可控的纳米级局部应变来化学图案化金属氧化物晶体表面。它研究和利用由稀有气体的仔细的低能量表面注入形成的局部应力来可控地改变表面反应性。因此，一个高分辨率的纳米级模板的纳米级埋原子簇创建所需的图案应变的表面层的金属氧化物。应变诱导反应或表面反应性的变化在电子材料的材料化学或甚至更一般地用于催化的氧化物中的几个感兴趣的系统中观察到。虽然该研究项目的主要重点是研究使用这种效应作为氧化物表面纳米级化学图案化的方法，但该项目具有更广泛的含义，可以提高我们对氧化物，纳米级表面化学及其控制的知识。这是对许多技术具有广泛影响的领域，包括医学和生物科学中先进传感器的表面功能化以及纳米系统器件的图案化。这项研究被纳入哥伦比亚大学的教育使命。首先，该项目启动了一个新的动手早期研究生计划：名为快速启动;该计划提供了一个机会，通过指导，材料准备和教学，学习氧化物材料现代实验研究所需的先进技术。第二，该项目有具体的计划和程序，以寻求招募不同的学生。招聘是通过外联会谈，本科生在哥伦比亚和通过积极参与本科研究机会计划（UROP）在哥伦比亚。第三，该项目使学生能够通过长期访问和短途旅行与美国和意大利的主要国家实验室合作，即新的Brookhaven功能纳米材料中心和的里雅斯特的ELETTRA同步加速器源。

Technical Description: This project examines the use of controllable nanoscale local strain to chemically pattern metal-oxide-crystal surfaces. It investigates and exploits local stress formed by careful, low-energy surface implantation of rare gases to controllably vary surface reactivity. Thus a high-resolution nanoscale template of nanometer-scale buried-atom clusters creates the needed patterned strain in the surface layers of metal oxides. Strain-induced reactions or change in surface reactivity is observed in several systems of interest to the materials chemistry of electronic materials or even more generally, for use in oxides for catalysis. While the main focus of the research project examines the use of this effect as a method of nanoscale chemical patterning on the oxide surface, the project has the broader implication of enhancing our knowledge of oxide, nanoscale surface chemistry and its control.Non-technical Description: This project is in the general areas of nanopatterning and complex-oxide surface chemical reactions; this is an area of broad impact for many technologies including surface functionalization for advanced sensors in medical and biological science, and patterning for nanosystem devices. The research is integrated into the education mission of Columbia University. First, the project enables initiation of a new hands-on early graduate student program: entitled Jump-Start; this program provides an opportunity to learn via mentoring, material preparation, and teaching the advanced techniques need for modern experimental research in oxide materials. Second, the project has concrete plans and procedures to seek out recruitment of diverse students. Recruitment is done via outreach talks to undergrads at Columbia and via active participation in the undergraduate research opportunities program (UROP) at Columbia. Third, the project enables students to collaborate, via extended visits and shorter trips, with a major US and an Italian national laboratory, i.e. the new Brookhaven Center for Functional Nanomaterials and the ELETTRA synchrotron source in Trieste.