Saturating holograms due to space-modulated phase-transition LC-isotropic phase in liquid crystals

1993 ◽  
Author(s):  
Oleg V. Yaroshchuk ◽  
Dmitry A. Voloshchenko ◽  
Victor Y. Reshetnyak ◽  
G. Pelzl
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Isotropic Phase ◽  
Modulated Phase

Electrolyte effects on the nematic–isotropic phase transition in lyotropic liquid crystals

2005 ◽  
Vol 32 (10) ◽  
pp. 1301-1306 ◽  
Author(s):  
Prabir K. Mukherjee ◽  
Jan P. F. Lagerwall ◽  
Frank Giesselmann
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Lyotropic Liquid Crystals ◽  
Isotropic Phase ◽  
Electrolyte Effects

scholarly journals Critical point for the blue-phase-III–isotropic phase transition in chiral liquid crystals

1996 ◽  
Vol 53 (5) ◽  
pp. 4955-4963 ◽  
Author(s):  
Zdravko Kutnjak ◽  
Carl W. Garland ◽  
Colin G. Schatz ◽  
Peter J. Collings ◽  
Christopher J. Booth ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Critical Point ◽  
Phase Iii ◽  
Isotropic Phase ◽  
Blue Phase ◽  
Chiral Liquid Crystals

scholarly journals Confinement Effect in a Thick Layer of LC Lanthanide Complex

Proceedings ◽  
2018 ◽  
Vol 2 (14) ◽  
pp. 1118
Author(s):  
Irina Lezova ◽  
Galina Polushina ◽  
Sergey Polushin
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Liquid Crystals ◽  
Phase Transition Temperature ◽  
Lanthanide Complex ◽  
Thick Layer ◽  
Molecular Complexes ◽  
Confinement Effect ◽  
Isotropic Phase ◽  
Crystal Complex

The structure of metallomesogen complexes differs essentially from that of calamitic liquid crystals, which emerges in their physical properties. We studied anomalous features of the transition from the nematic to isotropic phase in the ytterbium-based liquid crystal complex. For this, two approaches were used. In the first approach, we showed that the experimental values of the dielectric and optical anisotropies measured near the phase transition turned out to be substantially smaller than their calculated values. This evidently occurs because the phase transition temperature in the deep region of the experimental cell differs from that near the surface of the cell. Secondly, the temperature of N–I transitions in metallomesogenic layers within glass sandwich cells is obtained directly by means of the polarization microscope method. It was found that the phase transition temperature drops in more than ten degrees when reducing the metallomesogenic layer thickness from 200 to 5 microns. The calamite liquid crystals show the confinement effect only within the interstice of the specific size smaller than one micron. An anomalous confinement effect can be caused by a strong interaction of the molecular complexes with each other.

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