Hexatic and blue phases in a chiral liquid crystal: optical polarizing microscopy, synchrotron radiation and dielectric study

2014 ◽  
Vol 1 (3) ◽  
pp. 035101 ◽  
Author(s):  
Debashis Sinha ◽  
Asim Debnath ◽  
Pradip Kumar Mandal
Keyword(s):  
Liquid Crystal ◽  
Synchrotron Radiation ◽  
Dielectric Study ◽  
Polarizing Microscopy ◽  
Chiral Liquid Crystal ◽  
Blue Phases ◽  
Optical Polarizing Microscopy

Temperature-concentration phase diagram for the blue phases of a highly chiral liquid crystal

1987 ◽  
Vol 35 (9) ◽  
pp. 3959-3960 ◽  
Author(s):  
J. D. Miller ◽  
P. R. Battle ◽  
P. J. Collings ◽  
D. K. Yang ◽  
P. P. Crooker
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Chiral Liquid Crystal ◽  
Blue Phases

scholarly journals Study of Mesomorphism Changing on Terminal Side Chain with Different Thioalkyl Group

2015 ◽  
Vol 60 ◽  
pp. 142-151
Author(s):  
Ravindra Solanki ◽  
R.B. Patel
Keyword(s):  
Molecular Structure ◽  
Thermal Stability ◽  
Phase Diagram ◽  
Liquid Crystal ◽  
Spectral Data ◽  
Side Chain ◽  
Polarizing Microscopy ◽  
Molecular Rigidity ◽  
Optical Polarizing Microscopy ◽  
Transition Curves

A novel mesomorphic series is RS-C6H4-COO-C6H4-CO-CH=CH-C6H4-OC18H37(n) (para) of chalconyl ester play double role thermotropic as well as lyotropically bioactive is synthesized and studied with a view to understand and establish the effect on mesomorphism when changing on left thioalkyl chain.the relation between mesomorphism and molecular structure on the basis of molecular rigidity and flex Novel series consists of thirteen homologues of which four homologues (C1 to C3) are non liquid crystal and the rest of the homologues (C5 to C18) are thermotropically enantiotropic nematic absences with smectic property. Thermometric transition temperatures and textures of nematogenic phase are determined by an optical polarizing microscopy equipped with a heating stage (POM).Textures of nematicphas schilieren and threaded type. Cr-N/I and N-I transition curves behaves in as manner with negligible abnormality at C18 homologue in phase diagram of a series.Analytical and spectral data conforms the molecular structure of homologues. Thermal stability for nematic is 123.2 °C whose degree of mesomorphism vary minimum from 4.0°C to a maximum of 24.0 °C, and hence novel series is of middle ordered melting type.

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
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