A5100347900- Liquid Crystal Research Advancements
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Digital Economy and Work Transformation
- Photonic and Optical Devices
- Advanced Thermoelectric Materials and Devices
- Photonic Crystals and Applications
- Plant Reproductive Biology
- Advanced optical system design
- Urban and Freight Transport Logistics
- Synthesis and properties of polymers
- Optical Polarization and Ellipsometry
- Advanced Materials and Mechanics
- Transport and Economic Policies
- Maritime Ports and Logistics
- Molecular spectroscopy and chirality
- Proteins in Food Systems
- Lower Extremity Biomechanics and Pathologies
- Surfactants and Colloidal Systems
- Superconductivity in MgB2 and Alloys
- High voltage insulation and dielectric phenomena
- Pickering emulsions and particle stabilization
- Advanced Optical Imaging Technologies
- Lipid Membrane Structure and Behavior
- Advancements in Battery Materials
Gwangju Institute of Science and Technology
2022-2023
Sungkyunkwan University
2021
Daejeon St. Mary's Hospital
2020
Catholic University of Korea
2020
Pohang Iron and Steel (South Korea)
2020
University of Calgary
2018
Hanyang University
2012-2014
Hallym University
2003
Kent State University
1999
Sogang University
1997
We report a pitch invariance in cholesteric liquid crystals (CLCs) independent of temperature by mixing two chiral dopants. One dopant tends to shorten the helical CLC, but other makes longer, with increasing temperatures. From an analysis dependencies for each dopant, we determined ratio dopants invariance. Finally, obtained pitch-invariant CLCs and twisting power mixed was estimated.
In this paper, we propose a stable four-domain twisted nematic structure with wide viewing angle characteristics and fast response time. A was realized by introducing high pre-tilt approach incorporating stacked planar vertical alignment layers. The time thermal stability of the proposed device were dramatically improved addition UV-curable reactive mesogen (RM) mixed material. Polymerized RMs along liquid crystal (LC) director increased polar anchoring energy reduced back-flow phenomena....
A method to determine liquid crystal (LC) anchoring properties, that exploits the changes induced in a rubbed polyimide (PI) film upon exposure linearly polarized ultra-violet light, has been devised. The width of Gaussian PI chain distribution is determined from measured rotation film's index ellipsoid, long axis which also LC easy axis, as function time. quasi-microscopic surface free energy used model properties. This approach provides simple material independent for determining
We demonstrate uniformly and unidirectionally distributed pretilt characteristics of a liquid crystal cell fabricated via substrate with scan-directional slant nanosized surface groove pattern driven through an atomic force microscopic (AFM) tip that is continuously modulating the contact in scanning line direction. The resultant electro-optic (LC) made by our advanced AFM lithography technique show it generates unidirectional guarantees wider LC applications.
The criteria for controlling the anisotropic phase separation process in ferroelectric liquid crystal (FLC)-photopolymer mixtures are presented. Depending on FLC composition and irradiated intensity of ultraviolet light, one polymer-dispersed, separated (PS), polymer-network structures is found to be energetically favored form it from FLC-photopolymer mixture. In contrast a surface-stabilized cell, no broken layers defects observed under an external mechanical or thermal shock exerted PSFLC...
We have studied influence of Mn doping on electrical resistivity, magnetic properties, specific heat and elastic constants steels. The resistivity the steel with content 1.5 mass% (HM steel) is by 13% higher than that 0.3 (LM at 5 K, difference decreases as temperature increases. In addition, magnetocrystalline anisotropy constant K1 HM smaller LM 15% or more in a wide range. Despite these benefits steel, spontaneous magnetization 1.9% lower 0.9% steel. Elastic two steels are almost same....
Abstract Electro-optic (EO) modulation in polymer-dispersed ferroelectric liquid crystals (FLCs) has been studied as a function of the droplet size confined geometry. It is found that an optimum exists for best alignment molecules well smectic layers which produces maximum EO modulation. The quality depends critically on shape and FLC dropIets. stable structure formed inside droplets results from competition between elastic energy stored geometry surface interactions at FLC-polymer interface.
We studied phase transition from Sm A to C* by the simultaneous measurements of tilt angle, dielectric constant, and pyroelectric coefficient as functions temperature with various applied voltages. For ferroelectric liquid crystals small electroclinic effect, coefficients are maximum at temperature, which does not depend on voltage. However, for increases increasing The difference is proportional E2/3. Non-chiral Landau can be calculated experimental results compared other in literature.