Phase Transitions in Nematic and Cholesteric Liquid Crystals

向列型和胆甾型液晶中的相变

• 批准号: 8909815
• 负责人: Paul Keyes
• 金额: $ 13.9万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8909815&HistoricalAwards=false
• 关键词: Phase; Transitions; Nematic; Cholesteric; Liquid

Liquid crystals which possess orientational ordering but no positional ordering come in several different forms, most of which have been discovered only in recent years. These include some rather exotic structures, such as the cubic lattice blue phases and the amorphous fog phase found in cholesterics of high optical activity, and the biaxial nematic first discovered in a certain soap solution. It presents a series of optical experiments designed to probe the phase transitions of these materials. Their goal is to contribute to a better understanding of the many varieties of critical phenomena exhibited by systems, such as these, having tensor order parameters.

液晶具有取向有序性，但不 位置排序有几种不同的形式，大多数 这是近年来才发现的。 这些包括 一些相当奇特的结构，如立方晶格蓝 相和无定形雾相发现胆固醇高 光学活性，和双轴晶体管首次发现在一个 肥皂溶液。 它提出了一系列的光学实验，旨在探讨 这些材料的相变。 他们的目标是 有助于更好地了解多种多样的 这些系统所表现出的临界现象， 张量序参数