Excluded Volume and Electrostatic Interactions in Liquid Crystals

9412701 Samulski这项研究涉及液晶(LC)中分子间力的表征和量化。最终目标是根据液晶的分子结构特征了解其性质，以便合理设计针对特定应用(高对比度、快速切换、高自发极化等)优化的新介元。这是通过精心构建的实验和相关的实验结果建模来实现的，目的是根据取向势推导出LCS中分子有序性的一般公式。定向势的知识使人们能够构造分子的取向分布，从而计算分子的序张量，计算介元的热力学性质并将其与分子结构相关联。这个项目致力于测量液晶(LCS)中的分子性质，以便改进的LCS可以被设计用于新的显示应用，如高清晰度电视。这是通过研究选定的溶质在LC溶剂中的溶解行为来实现的，以澄清不同类型的分子间相互作用的重要性，这些相互作用有助于这些不寻常的流体的电光响应。其目的是加深对液晶重要物理和技术重要特征(如双折射、自发电极化)的分子起源的理解，并别有用心地为液晶显示器设计更灵敏、更高对比度的材料。

9412701 Samulski This research is concerned with characterization and quantification of intermolecular forces in liquid crystals (LCs). The ultimate goal is to understand the properties of liquid crystals in terms of their molecular structural features to allow rational designs for new mesogens optimized for specific applications (high contrast ratios, rapid switching, high spontaneous polarization, etc.). This is achieved through carefully constructed experiments and associated modeling of the experimental findings with the intention of deriving a general formulation of molecular ordering in LCs in terms of an orientational potential. Knowledge of orientational potentials allows one to construct the molecular orientation distribution and thereby calculate a molecule's order tensor, and compute and correlate thermodynamic properties of mesogens with molecular structure. %%% This project is concerned with the measurement of molecular properties in liquid crystals (LCs) so that improved LCs can be engineered for new display applications such as high definition TV. This is achieved by studying the behavior of selected solutes dissolved in LC solvents in order to clarify the importance of the different kinds of intermolecular interactions that contribute to the electro optic responses of these unusual fluids. The goal is an increased understanding of the molecular origins of important physical and technologically significant characteristics of liquid crystals (e.g., birefringence, spontaneous electric polarization) with the ulterior motive of designing more responsive and higher contrast materials for LC displays.