Highly polarized emission of the liquid crystalline conjugated polymer by controlling the surface anchoring energy

2014 ◽  
Vol 53 (3S1) ◽  
pp. 03CD04 ◽  
Author(s):  
Soo In Jo ◽  
Youngsik Kim ◽  
Ji-Ho Baek ◽  
Chang-Jae Yu ◽  
Jae-Hoon Kim
Keyword(s):  
Conjugated Polymer ◽  
Liquid Crystalline ◽  
Surface Anchoring ◽  
Polarized Emission ◽  
Anchoring Energy

scholarly journals Anchoring Energy for Nematic Liquid Crystals an Analysis of the Proposed Forms

1984 ◽  
Vol 39 (11) ◽  
pp. 1066-1076 ◽  
Author(s):  
G. Barbero ◽  
N. V. Madhusudana ◽  
G. Durand
Keyword(s):  
Liquid Crystal ◽  
Infinite Series ◽  
Tilt Angle ◽  
Legendre Polynomials ◽  
Fourier Expansion ◽  
Easy Axis ◽  
Practical Interest ◽  
Surface Anchoring ◽  
Functional Forms ◽  
Anchoring Energy

We analyze the proposed functional forms describing the surface anchoring energy of MBBA nematic liquid crystal. Measurements of the surface torque versus tilt angle suggest that the simple cosinus-square form is not adequate for MBBA. The generalized form in an infinite series in cosinus-square is not useful since the set of functions is not orthogonal. Analyses using the orthogonal Legendre polynomials and Fourier expansion are given. Finally we analyse the data in terms of small tilt angles compared to the easy axis, and very far from it, which are the two limits of practical interest.

scholarly journals Cubic microlattices embedded in nematic liquid crystals: a Landau-de Gennes study

2021 ◽  
Author(s):  
Razvan-Dumitru Ceuca
Keyword(s):  
Free Energy ◽  
Additional Term ◽  
Energy Functional ◽  
Free Energies ◽  
Cubic Symmetry ◽  
Surface Anchoring ◽  
Free Energy Functional ◽  
Different Types ◽  
Embedded Particles ◽  
Anchoring Energy

We consider a Landau-de Gennes model for a connected cubic lattice scaffold in a nematic host, in a dilute regime. We analyse the homogenised limit for both cases in which the lattice of embedded particles presents or not cubic symmetry and then we compute the free effective energy of the composite material. In the cubic symmetry case, we impose different types of surface anchoring energy densities, such as quartic, Rapini-Papoular or more general versions, and, in this case, we show that we can tune any coefficient from the corresponding bulk potential, especially the phase transition temperature. In the case with loss of cubic symmetry, we prove similar results in which the effective free energy functional has now an additional term, which describes a change in the preferred alignment of the liquid crystal particles inside the domain. Moreover, we compute the rate of convergence for how fast the surface energies converge to the homogenised one and also for how fast the minimisers of the free energies tend to the minimiser of the homogenised free energy.

A block copolymer nanotemplate for mechanically tunable polarized emission from a conjugated polymer

Polymer ◽  
2005 ◽  
Vol 46 (23) ◽  
pp. 10113-10118 ◽  
Author(s):  
Tao Deng ◽  
Craig Breen ◽  
Thomas Breiner ◽  
Timothy M. Swager ◽  
Edwin L. Thomas
Keyword(s):  
Block Copolymer ◽  
Conjugated Polymer ◽  
Polarized Emission

scholarly journals Enhanced and Polarization-Dependent Coupling for Photoaligned Liquid Crystalline Conjugated Polymer Microcavities

ACS Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 746-758 ◽  
Author(s):  
Florian Le Roux ◽  
Robert A. Taylor ◽  
Donal D. C. Bradley
Keyword(s):  
Conjugated Polymer ◽  
Liquid Crystalline

Lyotropic Liquid Crystalline Mesophase Governs Interfacial Molecular Orientation of Conjugated Polymer Thin Films

2020 ◽  
Vol 32 (14) ◽  
pp. 6043-6054
Author(s):  
Ge Qu ◽  
Kyung Sun Park ◽  
Prapti Kafle ◽  
Fengjiao Zhang ◽  
Justin J. Kwok ◽  
...  
Keyword(s):  
Thin Films ◽  
Conjugated Polymer ◽  
Molecular Orientation ◽  
Liquid Crystalline ◽  
Polymer Thin Films

Determination of the unified surface-anchoring energy of a nematic liquid crystal on a polymer substrate

1998 ◽  
Vol 72 (3) ◽  
pp. 329-331 ◽  
Author(s):  
Akihiko Sugimura ◽  
Tetsuo Miyamoto ◽  
Makoto Tsuji ◽  
Michiyoshi Kuze
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polymer Substrate ◽  
Surface Anchoring ◽  
Anchoring Energy
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