Journal ArticleDOI
A thermotropic biaxial nematic liquid crystal
TLDR
In this paper, optical studies have been carried out on a nematogenic copper complex, which incorporates the features of both rod-like and disk-like molecules, and conoscopic figures have been presented demonstrating the occurrence of a biaxial nematic phase in the pure complex, the uniaXial-biaxial (Na-Nb) transition in binary mixtures, and the temperature variation of the biaaxiality near this transition.Abstract:
Optical studies have been carried out on a nematogenic copper complex, which incorporates the features of both rod-like and disk-like molecules. Conoscopic figures are presented demonstrating (i) the occurrence of a biaxial nematic phase in the pure complex, (ii) the uniaxial-biaxial (Na-Nb) transition in binary mixtures, and (iii) the temperature variation of the biaxiality near this transition. The I-Na-Nb phase diagram has been studied for the binary system.read more
Citations
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Thermotropic biaxial nematic phase in liquid crystalline organo-siloxane tetrapodes.
TL;DR: Infrared absorbance measurements have been carried out on two liquid crystalline organo-siloxane tetrapode tetrapodes and unambiguously show the existence of a biaxial nematic phase below a uniaXial nematics phase.
Journal ArticleDOI
Liquid crystals of the twenty-first century – nematic phase of bent-core molecules
TL;DR: A comprehensive review of the main research directions and results can be found in this article, where the authors describe the properties of smectic nano clusters often observed in BCNs, and discuss rheological properties that reveal unusually large viscosities and small twist and bend elastic constants.
Journal ArticleDOI
Liquid crystals: A missing phase found at last?
TL;DR: Molecules that form liquid crystals are usually rod-like, but bend them and a new liquid-crystal phase — a biaxial nematic — should form, and this phase has only now emerged.
Journal ArticleDOI
Molecular design and computer simulations of novel mesophases
TL;DR: In this paper, attractive-repulsive models of the so-called Gay-Berne type have proved capable of generating nematic, smectic and columnar liquid crystals.
Journal ArticleDOI
Computer Simulations of Biaxial Nematics
TL;DR: An overview of the simulation work performed so far is given, and relying on the recent experimental findings, focuses on the still unanswered questions which will determine the future challenges in the field.
References
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Observation of a Biaxial Nematic Phase in Potassium Laurate-1-Decanol-Water Mixtures
TL;DR: In this article, the ternary system potassium laurate-1-decanol-D${2}\mathrm{O}$ was studied over concentration ranges where nematic phases are likely to occur.
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Ordered phases of a liquid of biaxial particles
TL;DR: In this article, a simple model for an interacting liquid of particles lacking an axis of rotational symmetry is proposed, and the four order parameters necessary to describe an ordered phase are identified.
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Phase Transitions in a Fluid of Biaxial Particles
TL;DR: In this paper, a model for a fluid of biaxial particles within a type of mean-field approximation was solved. And the results suggest that the phase diagram of such a fluid exhibits a special critical point where two second-order critical lines meet a first-order phase boundary in a sharp cusp.