Thermal and Optical Studies of Liquid Crystal Phases and Phase Transitions

液晶相和相变的热学和光学研究

• 批准号: 8703524
• 负责人: David Johnson
• 金额: $ 29.1万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-15 至 1991-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8703524&HistoricalAwards=false
• 关键词: Thermal; Optical; Studies; Liquid; Crystal

In the development of our current understanding of condensed phases of matter (e.g., solids, fluids, superfluids, liquid crystals, magnetism, etc.), the concepts of symmetry and dimensionality have played vital roles. This is especially true in the study of transitions from one phase to another where it is currently believed that a knowledge of the dimensionality and of the change in symmetry of the two phases is often sufficient for the determination of singularities in the structural and thermal response functions of the system very near the transition. This unifying concept is currently being widely tested and exploited to systematize condensed matter phases according to their sometimes subtle properties. Proposed here is a program of thermal and optical studies of certain monomer and polymer liquid crystal phases and phase transitions designed to reveal the place held by these interesting phases within the broader scheme of condensed matter phases, wherein it appears they may fill previously unknown but now conspicuous gaps.

在我们目前对浓缩的理解的发展中， 物质的相（例如，固体，流体，超流体，液体 晶体、磁性等），对称的概念， 维度起了至关重要的作用。 尤其如此 在研究从一个阶段到另一个阶段的转变时， 目前，人们认为， 两相对称性的改变通常足以 在结构和热的奇异性的确定 系统的响应函数非常接近过渡。 这 统一的概念目前正在广泛测试和利用 系统化凝聚态相， 有时是微妙的属性。 这里提出的是一个程序的热和光学研究的 某些单体和聚合物液晶相和相 过渡设计，以揭示这些举行的地方 在更广泛的凝聚态体系中， 在这些阶段，他们似乎可以填补以前未知的， 现在有明显的缺口