Dorothee Nonnenmacher, Dr. Stefan Jagiella, Qingxiang Song, Prof. Dr. Robert P. Lemieux and Prof. Dr. Frank Giesselmann Orientational Fluctuations Near the Smectic A to Smectic C Phase Transition in Two “de Vries”-Type Liquid Crystals ChemPhysChem 14
Do you know about shrinkage? The nature of “de Vries” smectic liquid crystals, in which rodlike molecules tilt inside a smectic layer without changing the thickness of the layer, has been an issue of debate since their discovery in the early 1970s. X-ray diffraction experiments on monodomain samples of two de Vries smectics now reveal that the practical absence of layer contraction originates from counteracting effects of molecular tilt and orientational ordering.
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