Stabilized electrically induced Helfrich deformation and enhanced color tuning in cholesteric liquid crystals

Soft Matter ◽  
2017 ◽  
Vol 13 (46) ◽  
pp. 8728-8735 ◽  
Author(s):  
Meina Yu ◽  
Huai Yang ◽  
Deng-Ke Yang
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Color Change ◽  
Cholesteric Liquid Crystals ◽  
Color Tuning ◽  
Ac Electric Field ◽  
Reflected Light ◽  
Periodic Layer

When subjected to an AC electric field perpendicular to its layers, the cholesteric planar state may undergo a periodic layer undulation, known as the Helfrich deformation, which generates a color change of the reflected light.

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-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

Chirality Recognition by a Color Change in Crowned Cholesteric Liquid Crystals

1991 ◽  
Vol 20 (3) ◽  
pp. 437-440 ◽  
Author(s):  
Seiji Shinkai ◽  
Tadahiko Nishi ◽  
Tsutomu Matsuda
Keyword(s):  
Liquid Crystals ◽  
Color Change ◽  
Cholesteric Liquid Crystals
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