Optical Microscopic Studies of Electric-Field-Induced Dynamics in Polymer-Dispersed Liquid Crystals: Confinement and Interfacial Effects

聚合物分散液晶中电场感应动力学的光学显微镜研究：限制和界面效应

• 批准号: 0092225
• 负责人: Daniel Higgins
• 金额: $ 27.55万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0092225&HistoricalAwards=false
• 关键词: Optical; Microscopic; Studies; Electric; Field

Professor Daniel Higgins of Kansas State University is supported by the Analytical and Surface Chemistry program and Solid State Chemistry in the Division of Materials Research to perform highly spatially-resolved experiments on polymer dispersed liquid crystals. The tiny droplets of liquid crystals studied here are of interest from standpoints both fundamental (for the new physics involved) and practical (optical device technology). This work seeks to elaborate on previous studies in which near field spectroscopy was used to generate a local field to reorient molecules in the liquid crystal. The dynamics of electric-field induced liquid crystal reorientation and ion generation, migration and recombination are to be studied using new time-resolved forms of NSOM and multiphoton-excited fluorescence microscopy. Droplet sizes will be controlled using latex sphere-produced templates. Work on new aspects of liquid crystals is especially timely because of its applicability to new materials for diffractive optics, switchable holograms and photorefractive devices. The work is also related to nanotechnology and biologically important effects.

堪萨斯州立大学的 Daniel Higgins 教授在材料研究部的分析和表面化学项目以及固态化学的支持下，对聚合物分散液晶进行了高度空间分辨率的实验。 从基础（涉及的新物理学）和实用（光学器件技术）的角度来看，这里研究的液晶微小液滴都很有趣。 这项工作旨在详细阐述之前的研究，其中使用近场光谱来产生局部场以重新定向液晶中的分子。将使用新的时间分辨形式的 NSOM 和多光子激发荧光显微镜来研究电场诱导液晶重新定向以及离子生成、迁移和重组的动力学。 液滴大小将使用乳胶球生成的模板进行控制。 液晶新方面的研究尤其及时，因为它适用于衍射光学、可切换全息图和光折变设备的新材料。 这项工作还与纳米技术和生物学上的重要影响有关。