The nonequilibrium response of a colloidal liquid-crystalline nematic phase to an external aligning field, which rotates in a plane, is explored by dynamical fundamental measure density-functional theory. Depending on the drive frequency, different dynamical states are found, which are characterized by towing and overtaking of the nematic director by the field as well as by breathing and dynami...

We have investigated the impact of titanium dioxide nanoparticles on the ionic contamination of liquid crystals. Nematic liquid crystals with high and low initial ionic contamination have been examined. It has been shown that titanium dioxide nanoparticles reduced the ion density of liquid crystals with high initial ionic contamination from 134.5 × 1012 cm-3 to 63.2 × 1012 cm-3. In the case of ...

Reorientational phenomenon in liquid crystals is unique for nonlinear optics applications. Recently there have been shown that the reorientational nonlinearity in nematic liquid crystals can govern spatial solitons in both waveguide and bulk geometry. Such solitons require a few milliwats of light power and they can be controlled by the state of light polarisation or an external electric field....

The mesophasic microreservoir comprises lyotrophic liquid crystals. The liquid crystals were prepared of Brij-35, cetosteryl alcohol and propranolol and evaluated for parameters viz. anisotropy, size and size distribution and drug entrapment efficiency. Subsequent to this liquid crystals based transdermal drug delivery system (TDS) was prepared by incorporating liquid crystals in previously pre...

Chirality and liquid crystals are both widely expressed in nature and biology. Helical assembly of mesophasic molecules and colloids may produce intriguing chiral liquid crystals. To date, chiral liquid crystals of 2D colloids have not been explored. As a typical 2D colloid, graphene is now receiving unprecedented attention. However, making macroscopic graphene fibres is hindered by the poor di...

Liquid crystals are systems which flow like liquids while retaining the mechanical and optical anisotropy of crystals. On a microscopic level they are characterized by molecular orientational order accompanied by a partial or complete translational disorder of the molecular positions (1~3) • Thermotropic liquid crystals are formed upon heating many anisotropic organic compounds, while lyotropic...

This book describes in detail various experimental techniques used in the study of liquid crystals. It will be indispensable for established workers in the field as well as students embarking on liquid crystal research. Each chapter in the book is dedicated to an important experimental technique used in the study and characteri-sation of liquid crystalline systems. Use of these techniques on li...

As the name suggests, ‘liquid crystals’ exist in an intermediate state between a liquid and a solid. The term may be misleading however, they are not a crystal, and they need not be a liquid. Liquid crystals exist all around us in everyday life in plastics, crude oil, lipstick, and many other places [2]. Their most widely known industrial application is in Liquid crystal displays (LCDs), which ...

LLE Review, Volume 66 103 Low-Molar-Mass Liquid Crystals Liquid crystals (LC’s) represent a state-of-matter intermediate between a solid crystal and an isotropic liquid. A liquid crystal flows like an ordinary liquid, while other properties, such as optical and dielectric anisotropies, resemble those of a crystalline solid.1 In general, a somewhat rigid and anisomeric molecular shape (e.g., cyl...

This study investigates a voltage-controllable liquid crystals lens with a Fresnel zone electrode. When applying a proper voltage on the liquid crystal cell, a Fresnel-zone-distributed electric field is induced to direct liquid crystals aligned in a concentric structure. Owing to the concentrically aligned liquid crystals, a Fresnel lens is formed. We probe the Fresnel liquid crystal lens using...