The Experts below are selected from a list of 120 Experts worldwide ranked by ideXlab platform

Jacques Meunier - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Alkane Chain Length on the Bending Elasticity Constant K of AOT Monolayers at the Planar Oil-Water Interface
    Europhysics Letters (EPL), 1991
    Co-Authors: Bernard P. Binks, Hamid Kellay, Jacques Meunier
    Abstract:

    In systems containing AOT + aqueous NaCl + normal alkane, the change of the microemulsion type from oil-in-water to water-in-oil through a surfactant-rich phase can be effected by increasing the aqueous phase salt concentration. We have investigated the multiphase behaviour (in Winsor systems) for a range of alkanes. The low oil-water interfacial tensions enable us to measure the bending Elasticity Constant K of the monolayer by ellipsometry. Values of K are independent of salt concentration but decrease with increasing alkane chain length. This is discussed in terms of the differing extents of oil penetration into the surfactant chain region and its consequences on the structure of the third phase.

Daniel Phillips - One of the best experts on this subject based on the ideXlab platform.

  • analysis of nematic liquid crystals with disclination lines
    Archive for Rational Mechanics and Analysis, 2012
    Co-Authors: Patricia Bauman, Jinhae Park, Daniel Phillips
    Abstract:

    We investigate the structure of nematic liquid crystal thin films described by the Landau–de Gennes tensor-valued order parameter model with Dirichlet boundary conditions on the sides of nonzero degree. We prove that as the Elasticity Constant goes to zero in the energy, a limiting uniaxial nematic texture forms with a finite number of defects, all of degree \({\frac{1}{2}}\) or all of degree \(-{\frac{1}{2}}\) , corresponding to vertical disclination lines at those locations. We also state a result on the limiting behavior of minimizers of the Chern–Simons–Higgs model without magnetic field that follows from a similar proof.

  • analysis of nematic liquid crystals with disclination lines
    arXiv: Analysis of PDEs, 2011
    Co-Authors: Patricia Bauman, Jinhae Park, Daniel Phillips
    Abstract:

    We investigate the structure of nematic liquid crystal thin films described by the Landau--de Gennes tensor-valued order parameter with Dirichlet boundary conditions of nonzero degree. We prove that as the Elasticity Constant goes to zero a limiting uniaxial texture forms with disclination lines corresponding to a finite number of defects, all of degree 1/2 or all of degree -1/2. We also state a result on the limiting behavior of minimizers of the Chern-Simons-Higgs model without magnetic field that follows from a similar proof.

S. Stepanow - One of the best experts on this subject based on the ideXlab platform.

Bernard P. Binks - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Alkane Chain Length on the Bending Elasticity Constant K of AOT Monolayers at the Planar Oil-Water Interface
    Europhysics Letters (EPL), 1991
    Co-Authors: Bernard P. Binks, Hamid Kellay, Jacques Meunier
    Abstract:

    In systems containing AOT + aqueous NaCl + normal alkane, the change of the microemulsion type from oil-in-water to water-in-oil through a surfactant-rich phase can be effected by increasing the aqueous phase salt concentration. We have investigated the multiphase behaviour (in Winsor systems) for a range of alkanes. The low oil-water interfacial tensions enable us to measure the bending Elasticity Constant K of the monolayer by ellipsometry. Values of K are independent of salt concentration but decrease with increasing alkane chain length. This is discussed in terms of the differing extents of oil penetration into the surfactant chain region and its consequences on the structure of the third phase.

Patricia Bauman - One of the best experts on this subject based on the ideXlab platform.

  • analysis of nematic liquid crystals with disclination lines
    Archive for Rational Mechanics and Analysis, 2012
    Co-Authors: Patricia Bauman, Jinhae Park, Daniel Phillips
    Abstract:

    We investigate the structure of nematic liquid crystal thin films described by the Landau–de Gennes tensor-valued order parameter model with Dirichlet boundary conditions on the sides of nonzero degree. We prove that as the Elasticity Constant goes to zero in the energy, a limiting uniaxial nematic texture forms with a finite number of defects, all of degree \({\frac{1}{2}}\) or all of degree \(-{\frac{1}{2}}\) , corresponding to vertical disclination lines at those locations. We also state a result on the limiting behavior of minimizers of the Chern–Simons–Higgs model without magnetic field that follows from a similar proof.

  • analysis of nematic liquid crystals with disclination lines
    arXiv: Analysis of PDEs, 2011
    Co-Authors: Patricia Bauman, Jinhae Park, Daniel Phillips
    Abstract:

    We investigate the structure of nematic liquid crystal thin films described by the Landau--de Gennes tensor-valued order parameter with Dirichlet boundary conditions of nonzero degree. We prove that as the Elasticity Constant goes to zero a limiting uniaxial texture forms with disclination lines corresponding to a finite number of defects, all of degree 1/2 or all of degree -1/2. We also state a result on the limiting behavior of minimizers of the Chern-Simons-Higgs model without magnetic field that follows from a similar proof.