title: Interplay of anisotropy in shape and interactions in charged platelet suspensions.
abstract: Motivated by the intriguing phase behavior of charged colloidal platelets, we investigate the structure and dynamics of charged repulsive disks by means of Monte Carlo simulations. The electrostatic interactions are taken into account through an effective two-body potential, obtained within the nonlinear Poisson-Boltzmann formalism, which has the form of anisotropic screened Coulomb potential. Recently, we showed that the original intrinsic anisotropy of the electrostatic potential in competition with excluded volume effects leads to a rich phase behavior that not only includes various liquid-crystalline phases but also predicts the existence of novel structures composed of alternating nematic-antinematic sheets. Here, we examine the structural and dynamical signatures of each of the observed structures for both translational and rotational degrees of freedom. Finally, we discuss the influence of effective charge value and our results in relation to experimental findings on charged platelet suspensions.
authors.affiliation: LPTMS, CNRS and Université Paris-Sud, UMR8626, Bat. 100, 91405 Orsay, France and Laboratoire Interdisciplinaire de Physique, UMR 5588, F-38041 Grenoble, France.
authors.forename: Sara
authors.initials: S
authors.lastname: Jabbari-Farouji
authors.affiliation: Laboratoire de Physique Théorique, Université Paris-Sud, UMR 8627 Bâtiment 210, 91405 Orsay Cedex, France.
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Weis
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Sud, UMR 8502 Bâtiment 510, 91405 Orsay Cedex, France.
authors.forename: Patrick
authors.initials: P
authors.lastname: Davidson
authors.affiliation: Laboratoire PECSA, UMR 7195, Université Pierre et Marie Curie, Case Courrier 51, 4 place Jussieu, 72522 Paris Cedex 5, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Levitz
authors.affiliation: LPTMS, CNRS and Université Paris-Sud, UMR8626, Bat. 100, 91405 Orsay, France.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Trizac