Polymer-Stabilized Cholesteric Liquid Crystal Diffraction Gratings for Optical Switching and Sensor Applications

2002 ◽  
Author(s):  
Samuel N. Sprunt ◽  
L. C. Chien
Keyword(s):  
Liquid Crystal ◽  
Optical Switching ◽  
Cholesteric Liquid Crystal ◽  
Diffraction Gratings ◽  
Sensor Applications ◽  
Polymer Stabilized

scholarly journals Polymer Stabilized Cholesteric Liquid Crystal Siloxane for Temperature-Responsive Photonic Coatings

2020 ◽  
Vol 21 (5) ◽  
pp. 1803 ◽  
Author(s):  
Weixin Zhang ◽  
Johan Lub ◽  
Albertus P.H.J. Schenning ◽  
Guofu Zhou ◽  
Laurens T. de Haan
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Cholesteric Liquid Crystal ◽  
Uv Curing ◽  
Blue Shift ◽  
Polymer Coatings ◽  
Chain Extension ◽  
Reflective Coating ◽  
Temperature Responsive ◽  
Polymer Stabilized

Temperature-responsive photonic coatings are appealing for a variety of applications, including smart windows. However, the fabrication of such reflective polymer coatings remains a challenge. In this work, we report the development of a temperature-responsive, infrared-reflective coating consisting of a polymer-stabilized cholesteric liquid crystal siloxane, applied by a simple bar coating method. First, a side-chain liquid crystal oligosiloxane containing acrylate, chiral and mesogenic moieties was successfully synthesized via multiple steps, including preparing precursors, hydrosilylation, deprotection, and esterification reactions. Products of all the steps were fully characterized revealing a chain extension during the deprotection step. Subsequently, the photonic coating was fabricated by bar-coating the cholesteric liquid crystal oligomer on glass, using a mediator liquid crystalline molecule. After the UV-curing and removal of the mediator, a transparent IR reflective polymer-stabilized cholesteric liquid crystal coating was obtained. Notably, this fully cured, partially crosslinked transparent polymer coating retained temperature responsiveness due to the presence of non-reactive liquid-crystal oligosiloxanes. Upon increasing the temperature from room temperature, the polymer-stabilized cholesteric liquid crystal coating showed a continuous blue-shift of the reflection band from 1400 nm to 800 nm, and the shift was fully reversible.

Broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal via a reactive surface coating layer

2017 ◽  
Vol 56 (20) ◽  
pp. 5731 ◽  
Author(s):  
Jongyoon Kim ◽  
Hyungmin Kim ◽  
Seongil Kim ◽  
Suseok Choi ◽  
Wonbong Jang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Surface Coating ◽  
Coating Layer ◽  
Cholesteric Liquid Crystal ◽  
Reactive Surface ◽  
Polymer Stabilized

scholarly journals Low-voltage-modulated laser based on dye-doped polymer stabilized cholesteric liquid crystal

2013 ◽  
Vol 3 (4) ◽  
pp. 519 ◽  
Author(s):  
Bo-wei Liu ◽  
Zhi-gang Zheng ◽  
Xu-chang Chen ◽  
Dong Shen
Keyword(s):  
Liquid Crystal ◽  
Low Voltage ◽  
Cholesteric Liquid Crystal ◽  
Polymer Stabilized ◽  
Doped Polymer

Interface modification of polymer stabilized cholesteric liquid crystal

2009 ◽  
Vol 20 (5) ◽  
pp. 501-506 ◽  
Author(s):  
Ka Ram Sun ◽  
Ju Yeon Woo ◽  
Yeong Hee Cho ◽  
Byung Kyu Kim
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Interface Modification ◽  
Polymer Stabilized
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