Electric field induced birefringence in nonaqueous dispersions of mineral nanorods - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Soft Matter Année : 2015

Electric field induced birefringence in nonaqueous dispersions of mineral nanorods

Résumé

Lanthanum phosphate (LaPO4) nanorods dispersed in the non-aqueous solvent of ethylene glycol form a system exhibiting large intrinsic birefringence, high colloidal stability and the ability to self-organize into liquid crystalline phases. In order to probe the electro-optical response of these rod dispersions we study here the electric-field-induced birefringence, also called Kerr effect, for a concentrated isotropic liquid state with an in-plane a.c. sinusoidal electric field, in conditions of directly applied (electrodes in contact with the sample) or externally applied (electrodes outside the sample cell) fields. Performing an analysis of the electric polarizability of our rod-like particles in the framework of Maxwell–Wagner– O’Konski theory, we account quantitatively for the coupling between the induced steady-state birefringence and the electric field as a function of the voltage frequency for both sample geometries. The switching time of this non-aqueous transparent system has been measured, and combined with its high Kerr coefficients and its features of optically isotropic ‘‘off-state’’ and athermal phase behavior, this represents a promising proof-of-concept for the integration of anisotropic nanoparticle suspensions into a new generation of electro-optical devices.
Fichier principal
Vignette du fichier
c5sm01427a.pdf; (2.35 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01187295 , version 1 (18-04-2024)

Identifiants

Citer

Alexis de La Cotte, Pascal Merzeau, Jong Wook Kim, Khalid Lahlil, Jean-Pierre Boilot, et al.. Electric field induced birefringence in nonaqueous dispersions of mineral nanorods. Soft Matter, 2015, 11 (33), pp.6595-6603. ⟨10.1039/c5sm01427a⟩. ⟨hal-01187295⟩
22 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More