Nanofabricated Surfaces: Atomic Force Microscopy and Surface-Enhanced Laser Spectroscopy at Ultrahigh Vacuum and Electrochemical Interfaces

纳米加工表面：超高真空和电化学界面的原子力显微镜和表面增强激光光谱

• 批准号: 9400780
• 负责人: Richard Van Duyne
• 金额: $ 28.3万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1997-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9400780&HistoricalAwards=false
• 关键词: Nanofabricated; Surfaces; Atomic; Force; Microscopy

This research project involves a systematic study of the microscopic mechanisms of surface enhanced laser spectroscopies, including surface enhanced Raman, hyper-Raman, second harmonic generation, and sum frequency generation spectroscopy. Several methods of nanostructure preparation, combined with scanning probe microscopic characterization of these structured surfaces, will be used to probe the electromagnetic and chemical mechanisms of surface enhanced laser spectroscopies. This work, supported by the Analytical and Surface Chemistry Program, will directly test present models of the surface enhancement mechanism by fashioning surfaces which match the structures modeled in leading theoretical descriptions of the effect. Contributions to the understanding of the surface enhanced spectroscopy, as well as to the development and characterization of nanostructured surfaces should result from this work. Impact well beyond the use of this method for studies of roughened surfaces is expected. Further development of the analytical methods of surface enhanced laser spectroscopy relies on the development of a quantitative, predictive explanation of the enhancement process. This research program will develop the theoretical underpinning for this technique by a careful set of experiments which rationally prepare surface structures which can be accurately theoretically modeled. The insights gained from the comparison of measurements on modelable surfaces should allow development of a quantitative theory. It is expected that useful methods for the fabrication of materials with nanostructured surfaces will also result.

本研究项目涉及系统地研究 表面增强激光光谱的机制，包括表面 增强拉曼、超拉曼、二次谐波产生和和 频率产生光谱学 纳米结构的几种方法 制备，结合扫描探针显微表征， 这些结构化表面将用于探测电磁场， 表面增强激光光谱学的化学机制。 这项工作， 由分析和表面化学计划的支持，将直接 通过成型测试目前的表面增强机理模型 表面匹配的结构建模在领先的理论 效果的描述。 对增进了解和 表面增强光谱，以及发展和 纳米结构化表面的表征应该从这项工作中产生。 影响远远超出了使用这种方法的研究粗糙 表面预期。 表面增强激光分析方法的进一步发展 光谱学依赖于一种定量的、预测的 增强过程的解释。 这项研究计划将 通过仔细的研究来发展这项技术的理论基础 合理制备表面结构的实验， 精确的理论模型。 从《经济学人》中获得的见解 在可建模表面上的测量比较应允许开发 一个定量理论。 希望能找到一些有用的方法， 还将导致具有纳米结构表面的材料的制造。