Structure and Dynamics in Surface Reactions

表面反应的结构和动力学

• 批准号: 0616457
• 负责人: Steven Bernasek
• 金额: --
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0616457&HistoricalAwards=false
• 关键词: Structure; Dynamics; Surface; Reactions

This project addresses the development of a molecular-level understanding of chemical reaction processes on solid surfaces, with a major theme being organic moieties on inorganic surfaces. The formation of organic monolayer structures will be systematically studied, with particular emphasis on the formation of chiral monolayers, using STM. Variations in adsorption temperature, adsorbate chain length and functionality, and the effect of solvent coadsorption and competitive coadsorption of mixed adsorbates, will be used to probe the energetics of structure formation. Adsorption of molecules on mineral surfaces relevant to the questions of molecular evolution and homochirality in living systems will be addressed. Studies of multilayer architectures on silicon surfaces will be expanded, using organometallic and organic coupling routes to construct these layers. Multilayer architectures will be examined by vibrational spectroscopy (high resolution electron energy loss spectroscopy and infrared spectroscopic ellipsometry), both in UHV and under ambient conditions. Finally, the thermal stability and decomposition mechanisms of organic monolayer corrosion inhibitors on iron surfaces, will be studied using a combination of UHV spectroscopic and electrochemical analysis methods.Professors Andrew Bocarsly and Steven Bernasek of Princeton University are supported by the Organic and Macromolecular Chemistry Program for studies with the goal of obtaining a molecular-level understanding of chemical reaction processes on solid surfaces, with a major theme being organic moieties on inorganic surfaces. Functionalized silicon and metal surfaces are of growing importance for micro- and molecular-electronics applications. This work will provide fundamental information about the structure and reactivity of organic monolayers and thin films. These results may help to answer questions about the development of chirality in living systems. Information from this work may be useful in the design of chiral separations media and chirally active catalysts. A fundamental understanding of semiconductor surface modification will be useful in the development of molecular electronic devices. An understanding of corrosion inhibitor adsorption and decomposition chemistry may be useful in designing improved inhibitor molecules with applications in electronic materials and structural materials corrosion inhibition. In addition to fundamental knowledge gained by this basic research, students ranging from high school to postdoctoral fellows will be trained in the art of research by involvement in various aspects of this work.

该项目致力于发展固体表面化学反应过程的分子水平理解，主要主题是无机表面上的有机部分。有机单分子层结构的形成将被系统地研究，特别强调手性单分子层的形成，使用STM。在吸附温度，吸附质链长和功能，溶剂共吸附和竞争共吸附的混合吸附的效果的变化，将被用来探测结构形成的能量。分子在矿物表面的吸附与生命系统中的分子进化和同手性问题有关。硅表面上的多层结构的研究将扩大，使用有机金属和有机耦合路线来构建这些层。多层结构将检查振动光谱（高分辨率电子能量损失光谱和红外光谱椭偏仪），无论是在超高真空和环境条件下。最后，将使用超高真空光谱和电化学分析方法相结合，研究铁表面有机单层缓蚀剂的热稳定性和分解机理。普林斯顿大学的Andrew Bocarsly和Steven Bernasek教授得到有机和大分子化学计划的支持，研究目标是从分子水平上了解固体表面的化学反应过程，主要的主题是无机表面上的有机部分。功能化的硅和金属表面对于微电子和分子电子应用越来越重要。这项工作将提供有关有机单分子膜和薄膜的结构和反应性的基本信息。这些结果可能有助于回答有关生命系统中手性发展的问题。本工作的信息可能是有用的手性分离介质和手性催化剂的设计。对半导体表面改性的基本理解将有助于分子电子器件的发展。对缓蚀剂吸附和分解化学的理解可能有助于设计改进的缓蚀剂分子，并应用于电子材料和结构材料的缓蚀。除了通过这项基础研究获得的基本知识外，从高中到博士后研究员的学生将通过参与这项工作的各个方面来接受研究艺术的培训。