GOALI: Depoloarized Resonant X-ray Scattering from Various Liquid Crystal Phases

GOALI项目的目的是以一种新颖的方式应用共振x射线散射来表征两种不同液晶化合物中各种手性微晶c相的结构。目标是提高实验分辨率，以获得更高质量的数据和更详细的结构信息。此外，至少有两种新的实验方法将被测试和实施，包括将电场对准液晶膜样品的原位应用，以及将该技术扩展到含有更高共振能量原子的液晶。在后一种情况下，可以直接用器件电池研究液晶。仪器仪表的发展在技术进步中起着至关重要的作用。开发硬件和分析工具来应用共振x射线散射来测量液晶中的取向相关性，可以应用于各种其他系统，例如，沉积在金属或半导体表面的有机薄膜，有机材料可以直接在器件单元内进行研究。这是一个由明尼苏达大学和朗讯科技合作的高度多学科、综合研究和教育项目，具有很强的国际成分。它是由多学科活动办公室和材料研究司共同资助的。

9901739HuangThe aim of this GOALI project is to apply resonant x-ray scattering in a novel way to characterize the structure of various chiral smectic-C phases found in two different liquid-crystal compounds. The goal is to increase the experimental resolution to obtain higher quality data and more detailed structural information. In addition, at least two new experimental approaches will be tested and implemented, including the in-situ application of aligning electric fields to the liquid-crystal film samples, and the extension of the technique to liquid crystals containing atoms at higher resonance energies. In the latter case, the liquid crystals can be directly studied with device cells.%%%Instrumentation development plays a crucial role in advancing technology. Developing the hardware and analysis tools to apply resonant x-ray scattering to measure orientational correlations in liquid crystals can be applied to a wide variety of other systems, e.g., organic thin films deposited on metal or semiconductor surfaces, with the organic materials able to be studied directly within device cells. This is a highly multidisciplinary and well integrated research and education project involving a collaboration between the University of Minnesota and Lucent Technologies, with a strong international component. It is jointly funded by the Office of Multidisciplinary Activities and the Division of Materials Resesarch.