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LIQUID CRYSTALS

Developments in Gas Liquid Chromatography Using Liquid Crystals as Stationary Phases

Developments in Gas Liquid Chromatography Using Liquid Crystals as Stationary Phases

... same degree of separation accompanied with some increase in peak width compared with that produced using CTAB-KCl stationary phase. Alcohol compounds such as methanol, ethanol, propanol, butanol, pentanol and hexanol) ...

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Smectic layer instabilities in liquid crystals

Smectic layer instabilities in liquid crystals

... A straight forward application of the formation process of horizontal chevrons in combination with the smectic layer reorientation is found for the generation of uniform alignment of ferroelectric liquid ...

66

Computational fluid dynamics for nematic liquid crystals

Computational fluid dynamics for nematic liquid crystals

... In this paper we have described a highly efficient algorithm for the computation of flow and orientation in nematic liquid crystals. Writing the influence of the orientation field on the flow in the form of ...

14

Liquid Crystals: An Approach in Drug Delivery

Liquid Crystals: An Approach in Drug Delivery

... of liquid crystalline systems as drug carrier, highlighting its applications in drug ...using liquid crystals technique as they respond to both pH and temperature depending upon the type of ...

11

Continuum theory of biaxial nematic liquid crystals

Continuum theory of biaxial nematic liquid crystals

... nematic liquid crystals, largely due to emerging experimental results that have appeared in the literature, especially those motivated by more recent confirmation of biaxial nematic phases ...

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Optical Measurements of Thermotropic Liquid Crystals

Optical Measurements of Thermotropic Liquid Crystals

... the liquid crystals with the desired birefringence were established ...the liquid crystal as a function of the temperature was measured with and without elec- tric ...

10

Annihilation of edge dislocations in smectic A liquid crystals

Annihilation of edge dislocations in smectic A liquid crystals

... has been made by Bruinsma and Safinya [26] and by Brand et al [27]. In the absence of a full and reliable dynamical theory, we restrict the study to order parameter relaxation. We note that in the case of nematic ...

27

Microstructure and Phase Behavior in Colloids and Liquid Crystals

Microstructure and Phase Behavior in Colloids and Liquid Crystals

... LCLCs have been observed and studied continuously over the past century [98,99,150]. The first reported observation of a LCLC phase is given by Sandquist in 1915, when a nematic texture was observed in an aqueous ...

224

Microfluidic flow of cholesteric liquid crystals

Microfluidic flow of cholesteric liquid crystals

... cholesteric liquid crystal patterns subject to Poiseuille flow within a slab geometry, and under different anchoring conditions at the ...complex liquid crystals in confinement and an important step ...

15

Elastic constants and dynamics in nematic liquid crystals

Elastic constants and dynamics in nematic liquid crystals

... In this paper we present molecular dynamics calculations of the Frank elastic constants, and associated time correlation functions, in nematic liquid crystals. We study two variants of the Gay-Berne ...

18

The role of conductive dopants in polymer cholesteric liquid crystals

The role of conductive dopants in polymer cholesteric liquid crystals

... A variety of conductive dopants were used to modify the electric properties of polymer cholesteric liquid crystals. Different types of carbon blacks and carbon nanotubes, as well as metallic particles were ...

12

Expulsion of disclinations in nematic liquid crystals

Expulsion of disclinations in nematic liquid crystals

... nematic liquid crystal is forced to display point or line singularities whenever the boundary conditions imposed on it are topologically nontrivial [24, 19, ...nematic liquid crystals [17], since any ...

17

Liquid Crystals Pharmaceutical Application: A Review

Liquid Crystals Pharmaceutical Application: A Review

... Liquid crystals (LC) are substances that flow like liquids but maintain some of the ordered structure characteristics of crystalline ...the liquid state, while the Lyotropic is formed by dissolving ...

6

Dielectric permittivity modulation of liquid crystals for microwave applications

Dielectric permittivity modulation of liquid crystals for microwave applications

... Table II lists the real and imaginary parts of the dielectric permittivity at 3GHz and the refractive index values at 589nm for the tested nematic liquid crystals. The studied materials exhibit a dielectric ...

10

The nematic phases of bent-core liquid crystals

The nematic phases of bent-core liquid crystals

... Measurement of the physical properties of the nematic phases formed by bent-core molecules has proven rather chal- lenging because of the high temperatures at which the nemat- ic phase often occurs (> 150 8C) and ...

10

Hydrodynamic instabilities in active cholesteric liquid crystals

Hydrodynamic instabilities in active cholesteric liquid crystals

... active liquid crystals, combining the force-dipole stresses already established for active materials with the cholesteric ordering that comes from a passive chiral ne- ...cholesteric liquid ...

17

Ordering of ferromagnetic nanoparticles in nematic liquid crystals

Ordering of ferromagnetic nanoparticles in nematic liquid crystals

... is in line with spherical colloidal particles in liquid crystals, is related to different defects surrounding the nanoparticles. It was observed that linear chains were formed for dipolar satellite defects, ...

28

On the biaxiality of smectic C and ferroelectric liquid crystals

On the biaxiality of smectic C and ferroelectric liquid crystals

... collaboration was caused by the dielectric biaxiality of the smectic C and ferroelectric smectic C* phases [2]. As will be described, this enabled a better understanding of those devices and the invention of improved FLC ...

67

Global defect topology in nematic liquid crystals

Global defect topology in nematic liquid crystals

... of the physical significance of such planar textures may be conveyed as follows. Liquid crystals reorient readily in response to applied electric or magnetic fields. For materials with negative dielectric ...

20

Simulation and theory of liquid crystals

Simulation and theory of liquid crystals

... form liquid crystalline phases, many are rod-like (calamitic) or disc-like (discotic) molecules, and are usually fairly rigid so as to maintain pref- erential ...discotic liquid crystalline phases tend to ...

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