By Johanna. R Bruckner
In this thesis Johanna Bruckner stories the invention of the lyotropic counterpart of the thermotropic SmC* section, which has develop into well-known because the merely spontaneously polarized, ferroelectric fluid in nature. via polarizing optical microscopy, X-ray diffraction and electro-optic experiments she firmly establishes points of the constitution of the unconventional lyotropic liquid crystalline part and elucidates its attention-grabbing homes, between them a reported polar electro-optic impact, analogous to the ferroelectric switching of its thermotropic counterpart. The helical flooring country of the mesophase increases the elemental query of the way chiral interactions are "communicated" throughout layers of roughly disordered and achiral solvent molecules that are situated among adjoining bi-layers of the chiral amphiphile molecules. This thesis bridges a major hole among thermotropic and lyotropic liquid crystals and pioneers a brand new box of liquid crystal research.
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Extra info for A First Example of a Lyotropic Smectic C* Analog Phase: Design, Properties and Chirality Effects
It is also possible to ﬁnd values for d up to 2L, if bilayers (SmA2) or partial bilayers (SmAd) are formed. This normally happens for strongly polar or amphiphilic molecules . The quality of the translational order of the mesogens within the smectic layers can be described with the smectic order parameter Σ which is deﬁned as : R¼ cos 2p zi d : ð3:2Þ In this equation zi, describes the position of a mesogen i with respect to the z-axis of Cartesian coordinate system in which z is parallel to the layer normal k and d is the smectic layer thickness.
11, 12], while texture images of lyotropic mesophases are found in Refs. [13, 14, 15]. e. D∞h, and the least order. As shown in Fig. 3a, b, the mesogens solely possess orientational order. Positional order of the mass centers does not occur in this phase. Nematic phases are usually built up by either rod-like or disc-like mesogens. For thermotropic liquid crystals these mesogens are therefore calamitic or discotic molecules, respectively. In both cases the phase is simply denoted with the abbreviation N.
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A First Example of a Lyotropic Smectic C* Analog Phase: Design, Properties and Chirality Effects by Johanna. R Bruckner