planar nematic liquid crystals
Rotational interaction of topological defects in planar nematic liquid crystals.
... transport of a dye λ due to a flow ∇Log(P ) while being subjected to diffusion. The defect solution P behaves in such a way that two defects approach eachother on the shortest path. The biggest change that can occur is ...
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Fredericksz transition threshold in nematic liquid crystals filled with ferroelectric nano particles
... The liquid crystal is placed in a cell of thickness L with identical homogeneous ...(i.e. planar and uniform) boundary conditions at each ...the liquid crystalline director to be sufficiently strong ...
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Flexoelectric polarization studies in bent core nematic liquid crystals
... of planar and homeotropic cells are equal in magnitude and opposite in direction we cannot therefore find any response from planar or homeotropic ...aligned nematic (HAN) cell in which the director ...
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Elasticity Tensors in Nematic Liquid Crystals
... the nematic, that is, one which is obtained for example in a cell with opposite conditions, homeotropic on one of the walls and planar on to the other (this is the so-called hybrid ...
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Computational fluid dynamics for nematic liquid crystals
... and we chose Bf = 2/3 and Tu = 1/5. The temperature was chosen as ϑ = 0, corresponding to the pseudo-critical temperature T ∗ . The time-step used in the explicit Euler method (for the orientation equations) was t = 0 . ...
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Deck The Walls: Curvature-Mediated Assembly In Confined Nematic Liquid Crystals
... A wall with homeotropic anchoring repels a colloid with the same anchoring; yet by changing the surface topography from planar to concave, one can turn repulsion into attraction. This study is inspired by biology, ...
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Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... of planar layers remains higher-energy than the epitaxially assembled TFCD lattice at arbitrarily large h, in agreement with the experimental robustness of the lattice at h/a > ...
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Propagating director bend fluctuations in nematic liquid crystals
... The parameter α appears in the continuum theory of switching phenomena, such as the homeotropic to planar-bend Freedericksz transition (see e.g. Chapter 5 of Ref. [3]). The influence of small values of α on ...
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Global defect topology in nematic liquid crystals
... of nematic textures in terms of topological properties of the entire domain and can be contrasted against the homotopy groups that reflect only the behaviour of the director field in the immediate vicinity of each ...
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Competition of lattice and basis for alignment of nematic liquid crystals
... Given the competition for LC alignment at the sub- strate layers, the constant-φ approximation may be too restrictive to characterize behavior at the surfaces of this system. The results of the MC simulations also ...
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Dielectric anisotropy of nematic liquid crystals loaded with carbon nanotubes in microwave range
... the planar LC alignment on the cell ...A liquid crystalline host in the isotropic phase has much lower viscosity compared with the nematic phase (39 mm 2 /s in nematic phase and ~1 mm 2 /s in ...
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Competing alignments of nematic liquid crystals on square patterned substrates
... thin nematic film confined between two identical nanopatterned ...from planar to homeotropic by appropriate tuning of the relative stripe widths and the film ...
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Optical Properties of Aligned Nematic Liquid Crystals in Electric Field
... aligned nematic liquid crystals (ANLCs) was investigated in terms of temperature variations through electrooptic effects under DC electric ...the planar and homeotropically aligned ...
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Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals
... B we propose a structure built of smectic layer fragments with an anticlinic tilt at the layer boundaries along the layer normal (Fig. 3a). The neighboring layer fragments are shifted by half molecular length and ...
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Alignment of liquid crystal E7 in composite photonic crystals based on single crystal silicon
... of nematic liquid crystal (LC) E7 on the surface of (111) silicon wafers and in the channels of grooved silicon structure has been ...E7 liquid crystal in grooved silicon exhibits a weak ...
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Defect Core Structures in Twisted Nematic and Twisted Chiral Liquid Crystals
... the nematic LCs are in deep nematic phase and respond to distortions by entering biaxial states, rather than melting [9]; while the most stable phase for chiral LC at τ = −1 is a helical phase, avoiding the ...
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Colloquium : disclination loops, point defects, and all that in nematic liquid crystals
... prototypical liquid crystalline material – though a sample will flow like a liquid, owing to the lack of positional order, the rod-shaped, typically organic or aromatic ring molecules are locally aligned, ...
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Light-induced Freedericksz transition and optical multistability in nematic liquid crystals
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Nematic liquid crystals doped with nanoparticles : phase behavior and dielectric properties
... of nematic liquid crystals doped with various nanoparticles have been studied in the framework of a molecular mean-field ...the liquid crystal material and cause a de- crease of the ...
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Benzothiazole Based Schiffs Base Nematic Liquid Crystals and their Copper Complexes
... . Liquid crystals containing a heterocyclic ring system have also been attracting attention in their own ...benzothiazole-based liquid crystals possessed good ...
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