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Article Dans Une Revue Physica B: Condensed Matter Année : 1995

Spirals in cholesteric liquid crystals: A possible nucleation initiator

Résumé

The helicoidal structure of the cholesteric liquid crystal phase can be untwisted by the electric field effect. We have shown that spiral-shaped structures could nucleate at the threshold of the field-induced homeotropic state from filaments (linked to the twisted state) embedded in a homeotropic matrix (untwisted cholesteric). In this article, we describe and study what are the mechanisms involved in this phenomenon. In particular, we study to what extent the characteristics suggest a nucleation mechanism based on the propagation from the surfaces of distortions in the distribution of molecules director. These deformations propagate through the homeotropic matrix adjacent to the filaments.
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hal-03642536 , version 1 (15-04-2022)

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Michel Mitov, P Sixou. Spirals in cholesteric liquid crystals: A possible nucleation initiator. Physica B: Condensed Matter, 1995, 216 (1-2), pp.132-140. ⟨10.1016/0921-4526(95)00441-6⟩. ⟨hal-03642536⟩
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