Conoscopic images have confirmed the occurrence of biaxial positive (NB+) and biaxial
negative (NB−) nematic phases between the two uniaxial nematic (discotic–ND and …

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 …

The lyotropic ternary mixture of dodecyltrimethylammonium bromide (DTMABr), 1-dodecanol
(DDeOH) and water (H 2 O) was studied by optical conoscopy and Abbe refractometer …

The system sodium dodecyl sulphate (SDS)/decanol (DeOH)/water presents, with
temperature increase, an unusual phase transition between a stable biaxial phase and a …

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 …

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 …

We investigate a lyotropic mixture presenting in the calamitic nematic phase (NC) and its
corresponding calamitic cholesteric phase (Ch C), where a small amount of the chiral agent …

Lyotropic cholesteric liquid crystalline phases were prepared by doping the ternary mixture
of potassium laurate (KL)/decanol (DeOH)/deuterium oxide (D 2 O) with brucine sulphate, in …

In this work we will study the behavior of the optical signal and optical axes along the
continuous transition of a lyotropic system from a nematic discotic (ND) phase to a nematic …

The calamitic nematic (NC)–biaxial nematic (NB)–discotic nematic (ND) phase transitions
are studied in a potassium laurate-decanol-potassium sulfate and water mixture by optical …