The isotropic-nematic transition in charged liquid crystals
نویسندگان
چکیده
2014 We discuss the phase diagram of a concentrated system of rods interacting via a Coulomb potential, and demonstrate the existence of a first-order isotropic-nematic transition. J. Physique 43 (1982) 651-654 AVRIL 1982, Classification Physics Abstracts 05.20 61.30C 64.70E
منابع مشابه
Investigation into the temperature dependence of isotropic- nematic phase transition of Gay- Berne liquid crystals
Density functional approach was used to study the isotropic- nematic (I-N) transition and calculate the values of freezing parameters of the Gay- Berne liquid crystal model. New direct and pair correlation functions of a molecular fluid with Gay- Berne pair potential were used. These new functions were used in density functional theory as input to calculate the isotropic- nematic transition den...
متن کاملThe Effect of Shear Flow on the Isotropic- Nematic Transition in Liquid Crystals
In this thesis I will discuss the effects of shear flow on the Isotropic-Nematic phase transition in liquid crystals. Shear flow has dramatic orienting effects on the rod-like constituents of nematic liquid crystals, with the general effects of (1) inducing order in the high-temperature isotropic phase, and (2) dictating a direction of alignment for the low-temperature nematic phase. Shear flow...
متن کاملIsotropic to nematic transition of aerosil-disordered liquid crystals.
We present a high-resolution study of the isotropic to nematic phase transition of a low birefringence liquid-crystal compound incorporating an aerosil gel. Calorimetry, light scattering, and microscopy data coherently combine to allow for an accurate determination of the temperature dependence of the onset of the nematic state. The nematic order develops on cooling through two distinct process...
متن کاملThe cosmological kibble mechanism in the laboratory: string formation in liquid crystals.
The production of strings (disclination lines and loops) has been observed by means of the Kibble mechanism of domain (bubble) formation in the isotropic-nematic phase transition of the uniaxial nematic liquid crystal 4-cyano-4'-n-pentylbiphenyl. The number of strings formed per bubble is about 0.6. This value is in reasonable agreement with a numerical simulation of the experiment in which the...
متن کاملIn situ laser-imprinted surface realignment of a nematic liquid crystal.
We present a new method for the in-plane realignment of nematic liquid crystals in already fully assembled cells with uni-directionally rubbed polyimide as an aligning layer. We use nematic liquid crystals (NLCs) with a relatively high nematic-isotropic transition temperature and we focus the IR laser beam of the laser tweezers selectively onto one or the other of the inner interfaces. The heat...
متن کامل