Electric-Field-Induced Phase Change in Cholesteric Liquid Crystals

1968 ◽  
Vol 20 (19) ◽  
pp. 1024-1025 ◽  
Author(s):  
J. J. Wysocki ◽  
J. Adams ◽  
W. Haas
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Phase Change ◽  
Cholesteric Liquid Crystals

Electric-Field Induced Phase Change in Cholesteric Liquid Crystals

1969 ◽  
Vol 8 (1) ◽  
pp. 471-487 ◽  
Author(s):  
J. Wysocki ◽  
J. Adams ◽  
W. Haas
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Phase Change ◽  
Cholesteric Liquid Crystals

Voltage-Induced Cholesteric Structure-Transformation in Thin Layers

1981 ◽  
Vol 36 (7) ◽  
pp. 718-726 ◽  
Author(s):  
Paul R. Gerber
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Thin Layers ◽  
Dielectric Anisotropy ◽  
Structure Transformation ◽  
Cholesteric Liquid Crystals ◽  
Threshold Voltages

Abstract o lta g e -In d u c e d C h o le s te r ic S tr u c tu r e -T r a n s f o r m a tio n in T h i n L a y e rs Measurements of various threshold voltages which occur in thin layers of cholesteric liquid crystals with positive dielectric anisotropy under homeotropic wall-alignment conditions are presented. Characteristic times are determined for some of the structure-changing processes which take place under application of electric-field changes. The measurements have been performed for various pitch-to-thickness ratios, and are expressed in empirical formulae.

Electric‐field controlled color effect in cholesteric liquid crystals and polymer‐dispersed cholesteric liquid crystals

1996 ◽  
Vol 80 (3) ◽  
pp. 1907-1909 ◽  
Author(s):  
Gouram Chilaya ◽  
Gerd Hauck ◽  
Hans Dieter Koswig ◽  
David Sikharulidze
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Cholesteric Liquid Crystals ◽  
Color Effect ◽  
Polymer Dispersed

scholarly journals Liquid Crystals as Phase Change Materials for Thermal Stabilization

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Eva Klemenčič ◽  
Mitja Slavinec
Keyword(s):  
Liquid Crystals ◽  
Heat Source ◽  
Electric Field ◽  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Stabilization ◽  
Phase Change Temperature ◽  
Thermotropic Liquid Crystals ◽  
Key Factor ◽  
Change Temperature

Thermal stabilization exploiting phase change materials (PCMs) is studied theoretically and numerically. Using the heat source approach in numerical simulations, we focus on phase change temperature as a key factor in improving thermal stabilization. Our focus is to analyze possible mechanisms to tune the phase change temperature. We use thermotropic liquid crystals (LCs) as PCMs in a demonstrative system. Using the Landau-de Gennes mesoscopic approach, we show that an external electric field or appropriate nanoparticles (NPs) dispersed in LCs can be exploited to manipulate the phase change temperature.

Thermal and electrical wavelength tuning of Bragg reflection with ultraviolet light absorbers in polymer-stabilized cholesteric liquid crystals

2018 ◽  
Vol 6 (45) ◽  
pp. 12377-12385 ◽  
Author(s):  
Amid Ranjkesh ◽  
Tae-Hoon Yoon
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Field ◽  
Ultraviolet Light ◽  
Bragg Reflection ◽  
Cholesteric Liquid Crystal ◽  
Wavelength Tuning ◽  
Cholesteric Liquid Crystals ◽  
Light Absorbers ◽  
Polymer Stabilized

A dual thermal and electrical polymer-stabilized cholesteric liquid crystal has been fabricated by using ultraviolet light absorbers. The Bragg reflection can be autonomously controlled by temperature and manually by an electric field.

Sign in / Sign up

Export Citation Format

Share Document