Stimuli-Directed Helical Axis Switching in Chiral Liquid Crystal Nanostructures

2018 ◽  
pp. 307-357 ◽  
Author(s):  
Rafael S. Zola ◽  
Quan Li
Keyword(s):  
Liquid Crystal ◽  
Helical Axis ◽  
Chiral Liquid Crystal ◽  
Axis Switching

scholarly journals Large Angle Forward Diffraction by Chiral Liquid Crystal Gratings with Inclined Helical Axis

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 807 ◽  
Author(s):  
Migle Stebryte ◽  
Inge Nys ◽  
Yera Ye. Ussembayev ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts
Keyword(s):  
Liquid Crystal ◽  
Total Internal Reflection ◽  
Large Angle ◽  
Forward Direction ◽  
Visible Range ◽  
Helical Axis ◽  
Chiral Liquid Crystal ◽  
Photo Alignment ◽  
Tilted Plane ◽  
Full Reflection

A layer of chiral liquid crystal (CLC) with a photonic bandgap in the visible range has excellent reflective properties. Recently, two director configurations have been proposed in the literature for CLC between two substrates with periodic photo-alignment: one with the director parallel to the substrates and one with the director in the bulk parallel to the tilted plane. The transmission experiments under large angles of incidence (AOI) presented in this work prove that, in the bulk, the director does not remain parallel with the substrates. Because of the inclined helical axis, the full reflection band can be observed at a smaller AOI than in planar CLC. For sufficiently large AOI, the reflection of diffracted light is prohibited by total internal reflection and efficient diffraction occurs in the forward direction.

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

Effects of Gold Nanoparticle Dispersion in a Chiral Liquid Crystal Matrix

2013 ◽  
Vol 572 (1) ◽  
pp. 59-65 ◽  
Author(s):  
M. Infusino ◽  
A. De Luca ◽  
F. Ciuchi ◽  
A. Ionescu ◽  
N. Scaramuzza ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Gold Nanoparticle ◽  
Nanoparticle Dispersion ◽  
Crystal Matrix ◽  
Chiral Liquid Crystal ◽  
Liquid Crystal Matrix

Chiral Liquid Crystal Trimer Exhibiting an Optically Uniaxial Smectic Phase with a Double-Peak Polarization

2012 ◽  
Vol 116 (15) ◽  
pp. 8678-8687 ◽  
Author(s):  
Daiki Tsuji ◽  
Yoichi Takanishi ◽  
Jun Yamamoto ◽  
Atsushi Yoshizawa
Keyword(s):  
Liquid Crystal ◽  
Smectic Phase ◽  
Double Peak ◽  
Chiral Liquid Crystal

Synthesis and properties of new (−)-menthol-derived chiral liquid crystal compounds with alkyl or alkoxy terminal groups

2016 ◽  
Vol 44 (3) ◽  
pp. 526-537 ◽  
Author(s):  
Ying-Gang Jia ◽  
Cong-Cong Luo ◽  
Zhao-Xia Zhu ◽  
Jian-She Hu
Keyword(s):  
Liquid Crystal ◽  
Chiral Liquid Crystal

Rheological Properties of a Chiral Liquid Crystal Exhibiting Type-II Character

2011 ◽  
Vol 547 (1) ◽  
pp. 39/[1729]-45/[1735] ◽  
Author(s):  
M. Rajeswari ◽  
J. Ananthaiah ◽  
R. Dabrowski ◽  
V. S. S. Sastry ◽  
S. Dhara ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Rheological Properties ◽  
Type Ii ◽  
Chiral Liquid Crystal

scholarly journals Synthesis of New Chiral Inducer and Preparation of Semi-Conducting Polymer Films Showing Fingerprint Structure

2014 ◽  
Vol 27 ◽  
pp. 6-12 ◽  
Author(s):  
Hiroki Hayashi ◽  
Kohsuke Kawabata ◽  
Hiromasa Goto
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Surface Morphology ◽  
Optical Microscopy ◽  
Conducting Polymer ◽  
Electrolyte Solution ◽  
Cholesteric Liquid Crystal ◽  
Chiral Liquid Crystal ◽  
Conducting Polymer Films ◽  
Electrochemical Polymerisation

We synthesised a rod like shaped new chiral inducer to construct chiral liquid crystal electrolyte solution. Next, electrochemical polymerisation was carried out in the chiral liquid crystal electrolyte solution. The surface morphology of the polymers were observed with polarising optical microscopy. Synthesis of the new chiral inducer and preparation of semi-conducting thin film in the cholesteric liquid crystal electrolyte solution were performed.

Spontaneous polarization, tilt angle, hysteresis and low-frequency relaxations in hydrogen bonded chiral liquid crystal dimer: M*SA:9OBA

2019 ◽  
Vol 551 (1) ◽  
pp. 178-196
Author(s):  
Mosalikanti Surekha ◽  
Attaluri Venkata Naga Ashok Kumar ◽  
Pallavajhula Venkata Chalapathy ◽  
Dakshina Murthy Potukuchi
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Spontaneous Polarization ◽  
Low Frequency ◽  
Chiral Liquid Crystal ◽  
Hydrogen Bonded
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