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

Effect of high pressure on relaxation dynamics and crystallization kinetics of chiral liquid crystal in its smectic phase

2021 ◽  
Author(s):  
Anna Drzewicz ◽  
Małgorzata Jasiurkowska-Delaporte ◽  
Ewa Juszyńska-Gałązka ◽  
Mirosław Gałązka ◽  
Wojciech Zając ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Crystal ◽  
Crystallization Kinetics ◽  
Crystallization Process ◽  
Smectic Phase ◽  
Relaxation Dynamics ◽  
Chiral Liquid Crystal ◽  
The Impact ◽  
Kinetics Of

The impact of high pressure on relaxation dynamics and the crystallization process in the smectic phase with antiferroelectric properties ( phase) of novel liquid crystal was studied.

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

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.

scholarly journals The interplay between spatial and heliconical orientational order in twist-bend nematic materials

2021 ◽  
Vol 23 (7) ◽  
pp. 4055-4063
Author(s):  
R. Saha ◽  
C. Feng ◽  
C. Welch ◽  
G. H. Mehl ◽  
J. Feng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Correlation Length ◽  
Orientational Order ◽  
Smectic Phase ◽  
Sulfur Containing

In sulfur containing liquid crystal dimers we find that at the transition to the NTB phase the positional correlation length drops. The nanoscale periodicity was also observed in the upper range of a smectic phase that forms below the NTB state.

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

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

Double-peak polarization current response in the unusual SmA * phase of a fluorinated high-tilt antiferroelectric liquid crystal

2010 ◽  
Vol 89 (1) ◽  
pp. 16001 ◽  
Author(s):  
S. Ghosh ◽  
P. Nayek ◽  
S. K. Roy ◽  
T. Pal Majumder ◽  
M. Zurowska ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Current Response ◽  
Polarization Current ◽  
Double Peak
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