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Elasticity of Lyotropic Chromonic Liquid Crystals Probed by Director Reorientation in Magnetic Field

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Lyotropic Chromonic Liquid Crystals

Part of the book series: Springer Theses ((Springer Theses))

Abstract

Using a magnetic Frederiks transition technique, we measure the temperature and concentration dependences of splay K 1, twist K 2, and bend K 3 elastic constants for the lyotropic chromonic liquid crystal sunset yellow formed through noncovalent reversible aggregation of organic molecules in water. K 1 and K 3 are comparable to each other and are an order of magnitude higher than K 2. At higher concentrations and lower temperatures, K 1 and the ratios K 1/K 3 and K 1/K 2 increase, which is attributed to elongation of self-assembled lyotropic chromonic liquid crystal aggregates, a feature not found in conventional thermotropic and lyotropic liquid crystals formed by covalently bound units of a fixed length.

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Zhou, S. (2017). Elasticity of Lyotropic Chromonic Liquid Crystals Probed by Director Reorientation in Magnetic Field. In: Lyotropic Chromonic Liquid Crystals. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-52806-9_2

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