Induced Anticlinic Ordering and Nanophase Segregation of Bow-Shaped Molecules in a Smectic Solvent

Prabal K. Maiti, Yves Lansac, Matthew A. Glaser, and Noel A. Clark
Phys. Rev. Lett. 88, 065504 – Published 25 January 2002
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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°.

  • Received 12 July 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.065504

©2002 American Physical Society

Authors & Affiliations

Prabal K. Maiti, Yves Lansac, Matthew A. Glaser, and Noel A. Clark

  • Department of Physics and Ferroelectric Liquid Crystal Material Research Center, University of Colorado, Boulder, Colorado 80309

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Vol. 88, Iss. 6 — 11 February 2002

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