Nematic liquid crystals on rectangle patterned substrates 137
Competing alignments of nematic liquid crystals on square patterned substrates
... a nematic is aligned between equivalent striped ...stripe- patterned boundaries, there exists a regime where the nematic is divided into domains of vertical and planar alignment that bridge between ...
10
Nematic liquid crystal alignment on stripe patterned substrates
... the substrates, but the central region forms a single domain whose orien- tation depends on the relative sizes of the homeotropic and homogeneous substrate ...
11
Competition of lattice and basis for alignment of nematic liquid crystals
... David B. Emerson, Mathew Wolak, and James H. Adler Department of Mathematics, Tufts University, 503 Boston Avenue, Medford, MA 02155, USA Due to elastic anisotropy, two-dimensional patterning of substrates can ...
12
Liquid crystal films confined between patterned substrates
... The most popular LCD is the twisted nematic device, which was developed in 1971 by Schadt and Helfrich. The TN LCD consists of a layer of LC material sandwiched between two glass plates. The inner glass surfaces ...
211
Optical Properties of Aligned Nematic Liquid Crystals in Electric Field
... glass substrates with resistance of 30 - 60 by using spin coater, after the polyimide coating, the photoresist mate- rial is coated on the surface of the polyimide film and finally the coated multilayer is ...
8
Flexoelectric polarization studies in bent core nematic liquid crystals
... polarization of the crystal and T is the temperature. Here we are considering macroscopic polarization P ∗ instead of P and the corresponding macroscopic pyroelectric coefficient γ = dP ∗ /dT . Due to the surface ...
6
Electro-optical Effect of Gold Nanoparticle Dispersed in Nematic Liquid Crystals
... To analyze the dielectric relaxation of the LC mixture, the vertically aligned LC cell was constructed with two ITO glass substrates that were coated with vertical PI. Figure 5 shows the dielectric spectra of the ...
10
Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... For device applications, it is desirable to produce FCDs with prescribed arrangements in 2D and 3D over large regions and to scale down the LC patterning. Here, we present a unique level of control to direct the growth ...
184
Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... For device applications, it is desirable to produce FCDs with prescribed arrangements in 2D and 3D over large regions and to scale down the LC patterning. Here, we present a unique level of control to direct the growth ...
184
Integrated optical devices based on liquid crystals embedded in polydimethylsiloxane flexible substrates
... 97 anticipated in the previous chapter, LC are materials that have the crystalline properties of solids and the fluidity of liquids. These materials can show transitions between several phases. The most studied phases of ...
186
Kickback in nematic liquid crystals
... Portugal ) Abstract. We describe a nonlocal linear partial differential equation arising in the analysis of dynamics of a nematic liquid crystal. We confirm that it accounts for the kick- back phenomenon by ...
12
Expulsion of disclinations in nematic liquid crystals
... – Liquid crystals: nematic, cholesteric, smectic, discotic, ...a nematic liquid crystal disclination and the surface of the half-space which bounds ...the nematic may expel the ...
17
Elasticity Tensors in Nematic Liquid Crystals
... in nematic liquid crystals can be described by tensors, and how these tensors can be represented using the director components and the Kronecker and Levi-Civita ...
12
Ordering of ferromagnetic nanoparticles in nematic liquid crystals
... V. CONCLUSIONS When subjected to a static magnetic field of small strength, ferromagnetic nanoparticles cluster and form chains in a nematic liquid crystal. The chains are linear in nature for the magnetic ...
28
The nematic phases of bent-core liquid crystals
... 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 because it has been diffi- cult to obtain ...
10
Computational fluid dynamics for nematic liquid crystals
... as liquid crystals and polymers is very challenging because of the altered structure of the flow equation: the underlying Navier–Stokes problem contains additional terms representing the interaction between ...
14
Continuum theory of biaxial nematic liquid crystals
... 2 Continuum model and energies It proves convenient to introduce the schematic diagram of a biaxial plate to describe the necessary directors for a biaxial nematic and to this end we follow the description used by ...
23
Global defect topology in nematic liquid crystals
... any nematic texture n : Ω → RP 2 , we try to compress it to a planar one in an inductive manner proceeding dimension by dimension on a cell decomposition for the ...
20
Elastic constants and dynamics in nematic liquid crystals
... dynamics, nematic, liquid crystal, elastic constants, ...A nematic liquid crystal phase can occur between the solid and the liquid phase for elongated or disk-shaped ...a nematic ...
18
Propagating director bend fluctuations in nematic liquid crystals
... Values of µ ∼ 10 −2 may be sufficient to generate such modes, and seem to be quite typical in these Gay-Berne particle-based simulations. We may speculate that the relatively smooth nature of the Gay-Berne forces, ...
13