%0 Journal Article
%T Capillary-induced giant elastic dipoles in thin nematic films
%+ Laboratoire de Physique de la Matiere Molle et de la Modélisation Electromagnétique [Tunis] (LP3ME)
%+ Department of Physics [Montréal]
%+ Laboratoire Charles Coulomb (L2C)
%A Jeridi, Haifa
%A Gharbi, Mohamed Amine
%A Othman, Tahar
%A Blanc, Christophe
%< avec comité de lecture
%Z L2C:15-210
%@ 0027-8424
%J Proceedings of the National Academy of Sciences of the United States of America
%I National Academy of Sciences
%V 112
%P 14771–14776
%8 2015-12-01
%D 2015
%R 10.1073/pnas.1508865112
%K capillarity
%K topological defects
%K nematic
%K self assembly
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]Journal articles
%X Directed and true self-assembly mechanisms in nematic liquid crystal colloids rely on specific interactions between microparticles and the topological defects of the matrix. Most ordered structures formed in thin nematic cells are thus based on elastic multipoles consisting of a particle and nearby defects. Here, we report, for the first time to our knowledge, the existence of giant elastic dipoles arising from particles dispersed in free nematic liquid crystal films. We discuss the role of capillarity and film thickness on the dimensions of the dipoles and explain their main features with a simple 2D model. Coupling of capillarity with nematic elasticity could offer ways to tune finely the spatial organization of complex colloidal systems.
%G English
%L hal-01236579
%U https://hal.science/hal-01236579
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021