Structure and Reactivity of Metal-Induced 1D Nanostructures on High-Index Silicon Surfaces

高折射率硅表面金属诱导一维纳米结构的结构和反应性

• 批准号: 0207643
• 负责人: Alison Baski
• 金额: $ 19.67万
• 依托单位: Virginia Commonwealth University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-01 至 2006-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0207643&HistoricalAwards=false
• 关键词: Structure; Reactivity; Metal; Induced; 1D

This project addresses one-dimensional nanostructures on silicon surfaces extending prior re-search to the reactivity of 1-D templates with oxygen and atomic hydrogen, and the growth of various metals on Si. It is anticipated that fundamental studies of these nanostructures will enable possible applications in devices, diffraction gratings, or as growth templates. This proposed work includes the following: Reactivity studies of noble metal-induced 1-D nanostructures grown on high-index Si. Based on previous work, noble metal-induced 1-D arrays can be produced by de-positing Ag or Au on high-index Si surfaces oriented at or near Si(5 5 12). Using STM, the reac-tivity of these 1-D arrays to oxygen will be investigated for O2 exposure under both oxidation and etching conditions. The project also includes studies on preferential etching of 1-D arrays using atomic hydrogen to enhance vertical surface corrugation. Growth studies of other groups of metals on Si(5 5 12) includes the growth of metals such as Fe and the rare earths (Dy, Ho, Er), and will be studied as a function of coverage and temperature on high-index surfaces near (5 5 12). The rare earth metals have recently been found to form robust nanowires on Si(001) and may demonstrate interesting growth on the high-index templates as well. %%% The project addresses fundamental research issues in a topical area of electronic/photonic materi-als science having technological relevance. An important feature of the project is the strong em-phasis on education, and the integration of research and education. This research will have a sub-stantial educational impact on VCU's relatively small physics department. The PI places empha-sis on involving undergraduates in research. A majority of the M.S. graduate students are trained in the PI's surface science group in order to gain skills necessary to either enter industry or to continue with a Ph.D. degree. It is anticipated that a number of students will be involved in this work over its duration, including a full-time Ph.D. student (Chemical Physics), three or four M.S. students, and a several undergraduates. ***

该项目致力于硅表面上的一维纳米结构，将先前的研究扩展到一维模板与氧和原子氢的反应性，以及各种金属在Si上的生长。预计这些纳米结构的基础研究将使可能的应用在设备，衍射光栅，或作为生长模板。这项工作包括以下内容：贵金属诱导的一维纳米结构生长在高指数硅的反应性研究。基于之前的工作，可以通过在取向为Si（5 5 12）或附近的高折射率Si表面上沉积Ag或Au来产生贵金属诱导的一维阵列。使用STM，这些一维阵列的反应性，以氧气暴露在氧化和蚀刻条件下进行了研究。该项目还包括使用原子氢优先蚀刻一维阵列以增强垂直表面的研究。其他组的金属在Si（5 5 12）的生长研究，包括金属，如铁和稀土（Dy，Ho，Er）的生长，并将研究作为覆盖率和温度的函数在高指数表面附近（5 5 12）。最近发现稀土金属在Si（001）上形成坚固的纳米线，并且在高折射率模板上也可能表现出有趣的生长。该项目涉及电子/光子材料科学领域的基础研究问题，具有技术相关性。该项目的一个重要特点是对教育的强烈重视，以及研究与教育的融合。这项研究将对VCU相对较小的物理系产生重大的教育影响。PI强调让大学生参与研究。大多数MS研究生在PI的表面科学小组接受培训，以获得进入行业或继续攻读博士学位所需的技能。℃下预计一些学生将参与这项工作的持续时间，包括全职博士。学生（化学物理），三个或四个硕士。学生和几个本科生。 ***