Conoscopic image of a biaxial negative in a reentrant discotic–biaxial nematic phase transition

DD Luders, GM Arcolezi, MLG Pereira, WS Braga… - Liquid …, 2021 - Taylor & Francis
Conoscopic images have confirmed the occurrence of biaxial positive (NB+) and biaxial
negative (NB−) nematic phases between the two uniaxial nematic (discotic–ND and …

An optical conoscopy study of a reentrant discotic nematic—Biaxial nematic phase transition

WS Braga, OR Santos, AR Sampaio, NM Kimura… - Journal of Molecular …, 2012 - Elsevier
A fundamental phase diagram with lyotropic nematic liquid crystals was reported by Yu and
Saupe a long time ago. Two uniaxial (calamitic—NC and discotic—ND) and one biaxial …

Conoscopic image of a biaxial negative nematic phase in a potassium laurate–decanol–D2O mixture

WS Braga, OR Santos, DD Luders, AR Sampaio… - Journal of Molecular …, 2013 - Elsevier
The discotic nematic (ND)–biaxial nematic (NB)–calamitic nematic (NC) phase transitions
are studied in a potassium laurate–decanol–D 2 O mixture by optical conoscopy. The N …

Lattice model for biaxial and uniaxial nematic liquid crystals

RA Sauerwein, MJ de Oliveira - The Journal of chemical physics, 2016 - pubs.aip.org
We use a lattice gas model to describe the phase transitions in nematic liquid crystals. The
phase diagram displays, in addition to the isotropic phase, the two uniaxial nematics, the rod …

Biaxial phase and coexistence of the two uniaxial nematic phases in the system sodium dodecyl sulphate–decanol–D2O

LQ Amaral, OR Santos, WS Braga, NM Kimura… - Liquid …, 2015 - Taylor & Francis
The system sodium dodecyl sulphate (SDS)/decanol (DeOH)/water presents, with
temperature increase, an unusual phase transition between a stable biaxial phase and a …

Properties of the broad-range nematic phase of a laterally linked H-shaped liquid crystal dimer

YK Kim, R Breckon, S Chakraborty, M Gao… - Liquid …, 2014 - Taylor & Francis
In search for novel nematic materials, a laterally linked H-shaped liquid crystal dimer has
been synthesised and characterised. The distinct feature of this material is a very broad …

Refractive index measurements in uniaxial and biaxial lyotropic nematic phases

WS Braga, OR Santos, DD Luders, NM Kimura… - Journal of Molecular …, 2016 - Elsevier
The calamitic (NC) and discotic (ND) uniaxial nematic phases are characterized by an order
parameter which is a second-rank, symmetric, traceless tensor with two different …

Low–temperature biaxial nematic from rod and disc mesogen mixture

R Berardi, C Zannoni - Soft Matter, 2012 - pubs.rsc.org
Molecular dynamics computer simulations have been employed to demonstrate that the
addition of a suitable uniaxial discotic nematic to a biaxial nematic (Nb) of elongated …

Elasticity of dispersions based on carbon nanotubes dissolved in a lyotropic nematic solvent

F Tardani, C La Mesa - The Journal of Physical Chemistry C, 2011 - ACS Publications
Single-walled carbon nanotubes were dispersed in a nematic solvent, made of sodium
dodecyl sulfate, decanol, and water. Fine and homogeneous dispersions were obtained …

Studies of some bio-inspired liquid crystals

LQ Amaral - Liquid Crystals, 2023 - Taylor & Francis
The main phase transition of lipid bilayers corresponds to a defined change from an ordered
(gel) to a disordered (fluid liquid crystal) state of hydrocarbon chains, occurring in general at …