Introduction to optical methods for characterizing liquid crystals at interfaces.

Introduction to optical methods for characterizing liquid crystals at interfaces.
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DOI:
10.1021/la304679f
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发表时间:
2013-03-12
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Abbott NL
Abbott NL
中科院分区:
其他
文献类型:
--
作者:
Miller DS;Carlton RJ;Mushenheim PC;Abbott NL

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本教学评论描述了可用于表征液晶 (LC) 在界面处自发呈现的方向以及液晶保持这些方向的强度(所谓的锚定能)的方法和基本原理。描述了这些方法在几种不同类别的液晶界面上的应用,包括固体和水界面以及平面和非平面界面(例如定义水包液晶乳液液滴的界面)。这些方法能够对聚合物、化学功能化和生物分子界面上的液晶有序性进行基础研究,本文中的描述水平易于非专业读者(例如本科生或研究生)理解。我们专注于光学方法,因为它们基于研究和教学实验室中广泛使用的仪器。
This Instructional Review describes methods and underlying principles that can be used to characterize both the orientations assumed spontaneously by liquid crystals (LCs) at interfaces and the strength with which the LCs are held in those orientations (so-called anchoring energies). The application of these methods to several different classes of LC interfaces is described, including solid and aqueous interfaces as well as planar and non-planar interfaces (such as those that define a LC-in-water emulsion droplet). These methods, which enable fundamental studies of the ordering of LCs at polymeric, chemically-functionalized and biomolecular interfaces, are described in this article at a level that can be easily understood by a non-expert reader such as an undergraduate or graduate student. We focus on optical methods because they are based on instrumentation that is found widely in research and teaching laboratories.
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