Title: High-resolution calorimetric study of a liquid crystalline organo-siloxane tetrapode with a biaxial nematic phase
Authors: Cordoyiannis, George ×
Apreutesei, Daniela
Mehl, Georg H.
Glorieux, Christ
Thoen, Jan #
Issue Date: 2008
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review E, Statistical, nonlinear, and soft matter physics vol:78 issue:1
Article number: 011708
Abstract: High-resolution adiabatic scanning calorimetry and di®erential scanning calorimetry have been
employed to study the thermal behaviour of an organo-siloxane tetrapode reported to exhibit a
biaxial nematic phase. No signature of the uniaxial to biaxial nematic phase transition could be
retraced in sequential heating and cooling runs under di®erent scanning rates, within the experi-
mental resolution. The results obtained in this work reveal that an extremely small heat should
be involved in the uniaxial to biaxial nematic phase transition. The isotropic to uniaxial nematic
transition at 318 § 0.01 K is very stable and it is weakly ¯rst order with a rather small latent heat
of 0.20 § 0.02 J/g.
ISSN: 1539-3755
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter and Biophysics
× corresponding author
# (joint) last author

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