nematic phase

nematic phase

[nə′mad·ik ‚fāz]
(physical chemistry)
A phase of a liquid crystal in the mesomorphic state, in which the liquid has a single optical axis in the direction of the applied magnetic field, appears to be turbid and to have mobile threadlike structures, can flow readily, has low viscosity, and lacks a diffraction pattern.
References in periodicals archive ?
The nematic phase shows dielectric anisotropy ([DELTA][epsilon] = [[epsilon].
Anomalous thermal behavior of salicylsalicylic acid and evidence for a monotropic transition to a nematic phase.
Use of either sulphuric or phosphoric acid yields a chiral nematic phase, but hydrochloric acid hydrolysis gives a viscous suspension that forms a birefringent, glassy phase after a "post-sulphation" treatment (Araki et al.
de Paris VII) describe theoretical and experimental studies in smectic and columnar liquid crystals for advanced students and researchers, covering such topics as structure of the smectic A phase and the transition toward the nematic phase, the continuum theory of smectics A hydrodynamics, dislocations, focal conics, rheology, ferroelectric and antiferroelectric mesophases, twist-grain boundary smectics, hexatic smectics and the smectic B plastic crystal, smectic free films, columnar phases, and growth of a columnar hexagonal phase.
Fact or Fiction: Cybotactic Groups in the Nematic Phase of Bent Core Mesogens
The anisotropic nature of the isotropic-nematic interface and the nematic phase itself will strongly influence the interfacial dynamics as well as droplet coalescence and breakup.
With the lowest melting temperature, E5E/THPA showed a nematic phase after melting (Fig.
The sharp peak on (b) or (d) would suggest an ordered structure like a smectic phase since a nematic phase generally shows small broad peaks like a diffuse scattering halo at higher diffraction angles.
From these diffractograms, it is also important to remark that the crystallization process of PEEK takes place in the presence of the nematic phase of Vectra[R] The presence of the crystalline reflections of PEEK has been observed over all composition ranges.
Therefore, in the case of SAA, smectic phase instead of nematic phase is formed from isotropic phase.
It was also assumed that the gas solubility occurred in the boundary regions and that the nematic phase did not sorb gas at all.