Critical behaviour at the isotropic–nematic and nematic–smectic A phase transitions of 4‐butyloxyphenyl 4′‐decyloxybenzoate liquid crystal from refractive index data

In this work, the effect of thin films on the thermotropic and thermo-optical properties and peculiarities of the phase transitions between the smectic A and isotropic liquid have been investigated. Peculiarities of the heterophase regions of the straight smectic A-isotropic liquid and reverse isotropic liquid-smectic A phase transitions have been studied. Change of morphologic properties of the heterophase regions, shift of the phase transition temperatures and the change of temperature widths of these heterophase regions under thin film influence have been observed.

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Studies of critical behaviour at the nematic to smectic A phase transition in C6 and C7 binary mixture system

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/41/6/062002 ◽

2008 ◽

Vol 41 (6) ◽

pp. 062002 ◽

Cited By ~ 1

Author(s):

SeungYeon Jeong ◽

DongWoo Kim ◽

KungWon Rhie ◽

MunPyo Hong ◽

Satyendra Kumar ◽

...

Keyword(s):

Phase Transition ◽

Binary Mixture ◽

Critical Behaviour ◽

Smectic A ◽

Smectic A Phase ◽

Mixture System

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Electric-Field-Dependent Tilt (Cone) Angle in a Chiral Smectic C Liquid Crystal Showing Electroclinic Effect in the Smectic A Phase

Japanese Journal of Applied Physics ◽

10.1143/jjap.30.l612 ◽

1991 ◽

Vol 30 (Part 2, No. 4A) ◽

pp. L612-L615 ◽

Cited By ~ 7

Author(s):

Ying-Bao Yang ◽

Akihiro Mochizuki ◽

Naoto Nakamura ◽

Shunsuke Kobayashi

Keyword(s):

Liquid Crystal ◽

Electric Field ◽

Cone Angle ◽

Smectic A ◽

Smectic C ◽

Field Dependent ◽

Smectic A Phase

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Prediction of excess molar volumes of selected binary mixtures from refractive index data

Journal of the Serbian Chemical Society ◽

10.2298/jsc130813127v ◽

2014 ◽

Vol 79 (6) ◽

pp. 707-718 ◽

Cited By ~ 5

Author(s):

Jelena Vuksanovic ◽

Divna Bajic ◽

Gorica Ivanis ◽

Emila Zivkovic ◽

Ivona Radovic ◽

...

Keyword(s):

Refractive Index ◽

Binary Mixtures ◽

Excess Molar Volumes ◽

Mixing Rules ◽

Mixing Rule ◽

Molar Volumes ◽

Index Data ◽

Peg 400 ◽

Benzene Toluene ◽

Refractive Index Data

The excess molar volumes of twenty two binary mixtures containing various groups of organic compounds: alcohols (ethanol, 1-propanol, 1,2-propanediol, 1,3-propanediol and glycerol), ketone (acetone), ester (butyl lactate), lactam (N-methyl-2-pyrrolidone), PEGs (PEG 200, PEG 400) and aromatics (benzene, toluene and pyridine) were predicted from the refractive index data, using three types of equations coupled with several mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and Oster. The obtained results were analysed in terms of the applied equation and mixing rule and the nature of interactions between the mixtures? components.

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Optical Microscopy Observations and Construction of Dupin Cyclides at the Isotropic/Smectic A Phase Transition

Materials ◽

10.3390/ma14164539 ◽

2021 ◽

Vol 14 (16) ◽

pp. 4539

Author(s):

Mikhael Halaby Macary ◽

Gauthier Damême ◽

Antoine Gibek ◽

Valentin Dubuffet ◽

Benoît Dupuy ◽

...

Keyword(s):

Phase Transition ◽

Numerical Simulation ◽

Liquid Crystal ◽

Optical Microscopy ◽

Smectic A ◽

Polarized Microscopy ◽

Smectic A Phase ◽

Dupin Cyclides

In this work, we are interested in the nucleation of bâtonnets at the Isotropic/Smectic A phase transition of 10CB liquid crystal. Very often, these bâtonnets are decorated with a large number of focal conics. We present here an example of a bâtonnet obtained by optical crossed polarized microscopy in a frequently observed particular area of the sample. This bâtonnet presents bulges and one of them consists of a tessellation of ellipses. These ellipses are two by two tangent, one to each other, and their confocal hyperbolas merge at the apex of the bâtonnet. We propose a numerical simulation with Python software to reproduce this tiling of ellipses as well as the shape of the smectic layers taking the well-known shape of Dupin cyclides within this particular bâtonnet area.

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