Phase Transitions and Molecular Mobility of a Discotic Liquid Crystal under Nanoscale Confinement

2013 ◽  
Vol 117 (38) ◽  
pp. 19712-19720 ◽  
Author(s):  
Christina Krause ◽  
Andreas Schönhals
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Molecular Mobility ◽  
Discotic Liquid Crystal

Complex molecular dynamics of a symmetric model discotic liquid crystal revealed by broadband dielectric, thermal and neutron spectroscopy

Soft Matter ◽  
2020 ◽  
Vol 16 (8) ◽  
pp. 2005-2016 ◽  
Author(s):  
Arda Yildirim ◽  
Christina Krause ◽  
Reiner Zorn ◽  
Wiebke Lohstroh ◽  
Gerald J. Schneider ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Liquid Crystal ◽  
Molecular Mobility ◽  
Time Range ◽  
Symmetric Model ◽  
Neutron Spectroscopy ◽  
Discotic Liquid Crystal

The molecular mobility of the discotic liquid crystal HAT6 is investigated in a broad time range using different methods.

Synthesis and mesomorphism of diacetylene-bridged triphenylene discotic liquid crystal dimers

2009 ◽  
Vol 52 (7) ◽  
pp. 975-985 ◽  
Author(s):  
Hong Ji ◽  
KeQing Zhao ◽  
WenHao Yu ◽  
BiQin Wang ◽  
Pin Hu
Keyword(s):  
Liquid Crystal ◽  
Discotic Liquid Crystal

ON AN ORIENTATION TRANSITION IN NEMATIC LIQUID CRYSTALS INDUCED BY THE THICKNESS OF THE SAMPLE

1993 ◽  
Vol 07 (18) ◽  
pp. 1215-1222
Author(s):  
A. L. ALEXE-IONESCU
Keyword(s):  
Experimental Data ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Tilt Angle ◽  
Critical Thickness ◽  
Large Range ◽  
Square Root ◽  
Chiral Molecules ◽  
Homeotropic Orientation

An orientation transition observed in nematic liquid crystal samples, induced by the thickness, is interpreted in a new way. By supposing that the nematic liquid crystal contains chiral impurities, it is shown that the homeotropic orientation is stable only for thicknesses smaller than a critical one, and is dependent on the concentration of the chiral molecules. At the critical thickness, the transition from the homeotropic orientation to the distorted one is characterized by a tilt angle proportional to the square root of the actual thickness minus the critical one. This trend is typical of second order phase transitions. The agreement between the theory and the experimental data is fairly good over a large range of thickness of the sample.

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