Zerihun Workineh
June 3rd, 2011
International School on Modeling and Computer Simulation Methods for Dendrimers
An international school on “Modeling and Computer Simulation Methods for Dendrimers” will be held in the University of Patras, Department of Materials Science from 12 to 15 December 2011
Updated information and program here
.
PRE: Liq. Cryst.
- Reshaping of a Janus ringAuthor(s): A. P. Zakharov and L. M. PismenWe consider the reshaping of closed Janus filaments acquiring intrinsic curvature upon actuation of a driven component—a nematic elastomer elongating upon phase transition. Linear stability analysis establishes instability thresholds of circles with no imposed twist, dependent on the ratio $q$ of th...[Phys. Rev. E 9 […]
- Free-energy model for nanoparticle self-assembly by liquid crystal sortingAuthor(s): Noé Atzin, Orlando Guzmán, Oscar Gutiérrez, Linda S. Hirst, and Sayantani GhoshWe modeled the experimentally observed self-assembly of nanoparticles (NPs) into shells with diameters up to 10 $μ\mathrm{m}$, via segregation from growing nematic domains. Using field-based Monte Carlo simulations, we found the equilibrium configurations of the system […]
- Self-propelled motion switching in nematic liquid crystal droplets in aqueous surfactant solutionsAuthor(s): Mariko Suga, Saori Suda, Masatoshi Ichikawa, and Yasuyuki KimuraThe self-propelled motions of micron-sized nematic liquid crystal droplets in an aqueous surfactant solution have been studied by tracking individual droplets over long time periods. Switching between self-propelled modes is observed as the droplet size decreases at a nearly constant […]
- Resonant x-ray scattering observation of transitional subphases during the electric-field-induced phase transition in a mixture of Se-containing chiral smectic liquid crystalsAuthor(s): Atsuo Iida, Yoichi Takanishi, Atsuo Fukuda, and Jagdish K. VijUsing resonant x-ray scattering techniques, transitional subphases during the electric-field-induced phase transition of a mixture of Se-containing chiral liquid crystals, 80% AS657 and 20% AS620, in a planar-aligned cell geometry were investigated, where the prototypical phase sequence […]
- Flexoelectro-optic effect and two-beam energy exchange in a hybrid photorefractive cholesteric cell with a short-pitch horizontal helixAuthor(s): V. Yu. Reshetnyak, I. P. Pinkevych, and D. R. EvansWe develop a theoretical model to describe two-beam energy exchange in a hybrid photorefractive cholesteric cell with a short-pitch helix oriented parallel to the cell substrates (so-called uniformly lying helix configuration). Weak and strong light beams incident on the hybrid cell interfere and […]
- Topological defects in two-dimensional liquid crystals confined by a boxAuthor(s): Xiaomei Yao, Hui Zhang, and Jeff Z. Y. ChenWhen a spatially uniform system that displays a liquid-crystal ordering on a two-dimensional surface is confined inside a rectangular box, the liquid crystal direction field develops inhomogeneous textures accompanied by topological defects because of the geometric frustrations. We show that the ric...[Ph […]
- Stresses in curved nematic membranesAuthor(s): J. A. SantiagoOrdering configurations of a director field on a curved membrane induces stress. In this work, we present a theoretical framework to calculate the stress tensor and the torque as a consequence of the nematic ordering; we use the variational principle and invariance of the energy under Euclidean moti...[Phys. Rev. E 97, 052706] Publis […]
- Influence of the extrinsic curvature on two-dimensional nematic filmsAuthor(s): Gaetano Napoli and Luigi VergoriNematic films are thin fluid structures, ideally two dimensional, endowed with an in-plane degenerate nematic order. In this paper we examine a generalization of the classical Plateau problem to an axisymmetric nematic film bounded by two coaxial parallel rings. At equilibrium, the shape of the nema...[Phys. Rev. E […]
- Pretransitional effects in a mesogenic mixture under an electric fieldAuthor(s): Mateusz Mrukiewicz, Paweł Perkowski, Olga Strzeżysz, Dorota Węgłowska, and Wiktor PiecekNematogenic liquids are materials that are in high demand for many application purposes. Field-induced nematic order in isotropic liquids can be observed by the enhancement of electric permittivity during dielectric spectroscopy measurements under the bias elec […]
- Uniform phases in fluids of hard isosceles triangles: One-component fluid and binary mixturesAuthor(s): Yuri Martínez-Ratón, Ariel Díaz-De Armas, and Enrique VelascoWe formulate the scaled particle theory for a general mixture of hard isosceles triangles and calculate different phase diagrams for the one-component fluid and for certain binary mixtures. The fluid of hard triangles exhibits a complex phase behavior: (i) the presence of a triatic phase […]