Induced anticlinic ordering and nanophase segregation of bow-shaped molecules in a smectic solvent

Maiti, Prabal K. ; Lansac, Yves ; Glaser, Matthew A. ; Clark, Noel A. (2002) Induced anticlinic ordering and nanophase segregation of bow-shaped molecules in a smectic solvent Physical Review Letters, 88 (6). Article ID 065504. ISSN 0031-9007

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Official URL: https://journals.aps.org/prl/abstract/10.1103/Phys...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.88.065504

Abstract

Recent experiments indicate that doping low concentrations of bent-core molecules into calamitic smectic solvents can induce anticlinic and biaxial smectic phases. We have carried out Monte Carlo simulations of mixtures of rodlike molecules (hard spherocylinders with length/breadth ratio Lrod/D=5) and bow-shaped molecules (hard spherocylinder dimers with length/breadth ratio Lban/D=5 or 2.5 and opening angle ψ). We find that a low concentration (3%) of Lban/D=5 dimers induces anticlinic ( SmCA) ordering in an untilted smectic (SmA) phase for 100°≤ψ<150°. For Lban/D=2.5, no tilted phases are induced. However, with decreasing ψ we observe a sharp transition from intralamellar nanophase segregation (bow-shaped molecules segregated within smectic layers) to interlamellar nanophase segregation (bow-shaped molecules concentrated between smectic layers) near ψ=130°.

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ID Code:113255
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