title: Induced anticlinic ordering and nanophase segregation of bow-shaped molecules in a smectic solvent.
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 L(rod)/D = 5) and bow-shaped molecules (hard spherocylinder dimers with length/breadth ratio L(ban)/D = 5 or 2.5 and opening angle psi). We find that a low concentration ( 3%) of L(ban)/D = 5 dimers induces anticlinic ( SmC(A)) ordering in an untilted smectic ( SmA) phase for 100 < or = psi < 150. For L(ban)/D = 2.5, no tilted phases are induced. However, with decreasing psi 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 psi = 130.
authors.affiliation: Department of Physics and Ferroelectric Liquid Crystal Material Research Center, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Prabal K
authors.initials: PK
authors.lastname: Maiti
authors.forename: Yves
authors.initials: Y
authors.lastname: Lansac
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Glaser
authors.forename: Noel A
authors.initials: NA
authors.lastname: Clark