Spectroscopic Characterization of Order and Disorder in Molecular Assemblies

集成光学中独特的基于激光的测量 这些结构将由伦敦大学的博恩教授使用， 伊利诺伊州厄巴纳监测单分子薄膜的结构 电影组件，在这个项目的支持下，分析 表面化学计划 这项工作的目标是 更好地描述了取向分布 由朗缪尔-布洛杰特（Langmuir-Blodgett） 沉积或通过自组装方法。 三个实验 将制定办法。 首先，荧光各向异性 和线性二色性测量将被应用于静态 高灵敏度的单层膜。 第二，秩序 组件将在直流电场下表征 扰动 三是薄层的动力响应 将通过监测对变量的光学响应来检查 频率电场扰动。 波导型光学 在这个项目中开发的探测方法提供了一个独特的 结构能力来表征这些 重要的分子组装。 %%% 单分子薄膜有序度的测定 电影是这个研究项目的目标， 分析和表面化学程序。 详细 了解这些薄膜材料的结构， 这对设计改进的生物活性传感器和跟踪至关重要， 分离方法，并可能影响改进的发展 防腐蚀涂层

Unique laser-based measurements in integrated optical structures will be used by Professor Bohn of the University of Illinois-Urbana to monitor the structure of monomolecular thin film assemblies, in this project supported by the Analytical and Surface Chemistry program. The goal of this work is to provide a better description of the orientational distribution of molecular assemblies prepared by Langmuir-Blodgett deposition or by self-assembly methods. Three experimental approaches will be developed. First, fluorescence anisotropy and linear dichroism measurements will be applied to static monolayers at high sensitivity. Second, the order of the assembly will be characterized under dc electric field perturbation. Third, the dynamic response of the thin layer will be examined by monitoring optical response to variable frequency electric field perturbations. The waveguide optical probe methods developed in this project provide a unique structural capability for characterizing order in these important molecular assemblies. %%% Determination of the degree of order in monomolecular thin films is the goal of this research project supported by the Analytical and Surface Chemistry program. A detailed understanding of the structure of these thin film materials is crucial to the design of improved bioactive sensors and trace separation methods, and may impact the development of improved corrosion coatings.