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- W2017939581 abstract "Abstract Surface tension is known to induce smectic O (SO) films at the free surface of isotropic droplets of 1-methylheptyl terephthalylidene-bis-4-aminocinnamate (MHTAC). The SO film has its molecules disposed in a herringbone fashion, with the layers parallel to the free surface. It constitutes a model of a 2D polar nematic liquid crystal without any contact to solid substrates. The film is oriented uniformly when applying a uniform electric field, except along disclination walls. By measuring the width of the disclination walls in the two configurations with the electric field parallel and perpendicular, we determine the anisotropy of the elastic constants in the induced So films. We find the ratio of the 2D bend to splay elastic constants K b/K s to be ≃ 0.25 which is anomalously small when compared to the corresponding 3D ratio (K 2 + K 3)/2K 1 usually found for the bulk nematic phase. This experimental result is comparable to measurements performed with 2D suspended Sc films with, however, a different physics." @default.
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- W2017939581 date "1993-10-01" @default.
- W2017939581 modified "2023-09-26" @default.
- W2017939581 title "Anomalous anisotropy of the elastic constants in the induced smectic O film" @default.
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- W2017939581 doi "https://doi.org/10.1080/02678299308036473" @default.
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