scholarly journals The Effect of Polymer Type on the Thermal Stability and Mechanical Behavior of Blue Phase Cholesteric Liquid Crystal

2018 ◽  
Vol 18 (1) ◽  
pp. 403-411 ◽  
Author(s):  
Emine Kemiklioğlu ◽  
Enver Atik ◽  
Can Çivi
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Mechanical Behavior ◽  
Cholesteric Liquid Crystal ◽  
Blue Phase ◽  
Polymer Type

Electron microscopy of a cholesteric liquid crystal and its blue phase

1984 ◽  
Vol 29 (5) ◽  
pp. 2957-2959 ◽  
Author(s):  
M. J. Costello ◽  
S. Meiboom ◽  
M. Sammon
Keyword(s):  
Electron Microscopy ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Blue Phase

Relation between physical parameters and thermal stability of liquid-crystal blue phase

2010 ◽  
Vol 97 (18) ◽  
pp. 181919 ◽  
Author(s):  
Hui-Yu Chen ◽  
Hsin-Hung Liu ◽  
Jia-Liang Lai ◽  
Chih-Hao Chiu ◽  
Ji-Yi Chou
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Physical Parameters ◽  
Blue Phase ◽  
Thermal Stability Of

Observation of blue phase in chiral nematic liquid crystal and its stabilization by silica nanoparticles

2016 ◽  
Vol 30 (05) ◽  
pp. 1650011 ◽  
Author(s):  
Arshdeep Singh ◽  
Praveen Malik ◽  
Divya Jayoti
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Binary Mixture ◽  
Silica Nanoparticles ◽  
Formation Process ◽  
Temperature Range ◽  
Chiral Nematic ◽  
Blue Phase ◽  
Thermal Stability Of

In the present work, we report the blue phase (BP) in a binary mixture of cholesteryl nonanoate (CN) and N-(4-ethoxybenzylidene)-4-butylaniline (EBBA). The mixture exhibits BP over a temperature range of 2.3 K at optimum composition (50:50) of liquid crystals (LCs). The effect of silica nanoparticles (SNPs) doping on thermal stability of BPs has also been demonstrated and nearly 6 K wide BP temperature range was achieved at 0.5 wt.% of SNPs. A porous type texture was also observed during the BP formation process in the doped samples.

Electrically Switched Liquid Crystal Color and Device Applications

2010 ◽  
Vol 428-429 ◽  
pp. 24-28
Author(s):  
Shin Ying Lu ◽  
Liang Chy Chien
Keyword(s):  
Liquid Crystal ◽  
Incident Light ◽  
Cholesteric Liquid Crystal ◽  
Blue Shift ◽  
Additive Formulation ◽  
Device Applications ◽  
Blue Phase ◽  
Different Color ◽  
Polymer Stabilized ◽  
Color Filters

We demonstrate a polymer-stabilized cholesteric liquid crystal (PSChLC) where the reflected color can be electrically-switched to reflect a different color at a shorter wavelength (blue-shift). A polymerizable additive formulation is used to ensure a wider range of color tuning and anisotropic reflection where on side reflects and the other side transmits the incident light in response to applied voltage. A second electrically switched color based on polymer-stabilized blue phase (PSBP) liquid crystal is also demonstrated. Applying an electric field across the cell results in a red-shift in Bragg reflected wavelength due to the electrostriction effect. These switchable color devices of are color filters and polarizers free which are suitable for electronic papers.

scholarly journals Effect of Sectional Polymerization Process on Tunable Twist Structure Liquid Crystal Filters

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 268
Author(s):  
Changli Sun ◽  
Jiangang Lu
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Wide Band ◽  
Polymerization Process ◽  
Central Wavelength ◽  
Hyper Spectral ◽  
Phase Liquid ◽  
Blue Phase ◽  
Polymer Stabilized ◽  
Color Filters

The effect of sectional polymerization process on tunable filters with cholesteric liquid crystal (CLC) and blue phase liquid crystal (BPLC) is demonstrated. The bandwidths of the polymer-stabilized cholesteric liquid crystal (PSCLC) and polymer-stabilized blue phase liquid crystal (PSBPLC) filters can be broadened by the holding treatment without distortion. The reflection bandwidth of the CLC filter can be broadened from 120 nm to 220 nm, and that of the BPLC filter can be broadened from 45 nm to 140 nm. Meanwhile, the intensity of reflection can be retained very well. The central wavelength of polymer-stabilized CLC filter can be thermally tuned from 1614 nm to 1460 nm with a stable wide bandwidth. The tunable C-band CLC filter and BPLC filter show great potential application in multi- and hyper-spectral systems and wide-band color filters.

scholarly journals Polymer stabilized cholesteric liquid crystal particles with high thermal stability

2018 ◽  
Vol 8 (6) ◽  
pp. 1536 ◽  
Author(s):  
Qi Yan ◽  
Zhan Wei ◽  
Pengcheng Lin ◽  
Zhengdong Cheng ◽  
Mingrui Pu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
High Thermal Stability ◽  
Polymer Stabilized

scholarly journals Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 451 ◽  
Author(s):  
Shenghao Zha ◽  
Hongzhou Zhang ◽  
Changli Sun ◽  
Yifan Feng ◽  
Jiangang Lu
Keyword(s):  
Liquid Crystal ◽  
Incident Angle ◽  
Incident Light ◽  
Cholesteric Liquid Crystal ◽  
Temperature Shift ◽  
Central Wavelength ◽  
Multi Wavelength ◽  
Phase Liquid ◽  
Blue Phase ◽  
Wavelength Filters

The multi-wavelength filters in the visible light band using the blue phase liquid crystal (BPLC) template was investigated. A multi-layer templated BPLC (T-BPLC) filter without intermediate dielectric layers was fabricated, which may reflect multi-wavelength in one filter. Compared with the cholesteric liquid crystal (CLC) filter, the T-BPLC filter may get a much narrower reflection bandwidth (<15 nm), show better angular stability of incident light, and have a more stable wavelength and bandwidth with a temperature shift. Furthermore, the central wavelength and bandwidth can be easily controlled by the fabrication process and the optimization of the material concentration. When the incident angle varies, the shift of the center wavelength of the T-BPLC filter is much smaller than that of the CLC filter. The multi-wavelength filter shows a potential application in color filters and high-density wavelength division multiplexed networks.

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