Light-scattering investigations of the liquid-liquid phase transition of the ionic system: Trimethylethyl-ammonium bromide in chloroform

1994 ◽  
Vol 15 (6) ◽  
pp. 1045-1056 ◽  
Author(s):  
S. Wiegand ◽  
M. Kleemeier ◽  
J. M. Schr�der ◽  
W. Schr�er ◽  
H. Weing�rtner
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Liquid Phase ◽  
Ammonium Bromide ◽  
Liquid Phase Transition ◽  
Ionic System

Near‐critical light scattering of an ionic fluid with liquid–liquid phase transition

1992 ◽  
Vol 96 (1) ◽  
pp. 848-851 ◽  
Author(s):  
Hermann Weingärtner ◽  
Simone Wiegand ◽  
Wolffram Schröer
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Liquid Phase ◽  
Liquid Phase Transition

scholarly journals Electrically Induced Liquid–Liquid Phase Transition in a Floating Water Bridge Identified by Refractive Index Variations

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 602
Author(s):  
Elmar C. Fuchs ◽  
Jakob Woisetschläger ◽  
Adam D. Wexler ◽  
Rene Pecnik ◽  
Giuseppe Vitiello
Keyword(s):  
Phase Transition ◽  
Refractive Index ◽  
Liquid Phase ◽  
Pure Water ◽  
Resonance Effect ◽  
Water Bridge ◽  
Liquid Phase Transition ◽  
Light Passing ◽  
Floating Water Bridge ◽  
Set Up

A horizontal electrohydrodynamic (EHD) liquid bridge (also known as a “floating water bridge”) is a phenomenon that forms when high voltage DC (kV·cm−1) is applied to pure water in two separate beakers. The bridge, a free-floating connection between the beakers, acts as a cylindrical lens and refracts light. Using an interferometric set-up with a line pattern placed in the background of the bridge, the light passing through is split into a horizontally and a vertically polarized component which are both projected into the image space in front of the bridge with a small vertical offset (shear). Apart from a 100 Hz waviness due to a resonance effect between the power supply and vortical structures at the onset of the bridge, spikes with an increased refractive index moving through the bridge were observed. These spikes can be explained by an electrically induced liquid–liquid phase transition in which the vibrational modes of the water molecules couple coherently.

scholarly journals Two-state thermodynamics and the possibility of a liquid-liquid phase transition in supercooled TIP4P/2005 water

2016 ◽  
Vol 144 (14) ◽  
pp. 144504 ◽  
Author(s):  
Rakesh S. Singh ◽  
John W. Biddle ◽  
Pablo G. Debenedetti ◽  
Mikhail A. Anisimov
Keyword(s):  
Phase Transition ◽  
Liquid Phase ◽  
Liquid Phase Transition

EFFECT OF THE SURFACES ON ORIENTATIONAL PROPERTIES AND PECULIARITIES OF PHASE TRANSITIONS IN THERMOTROPIC NEMATICS

2005 ◽  
Vol 19 (18) ◽  
pp. 2975-2987 ◽  
Author(s):  
ARIF NESRULLAJEV ◽  
FATMA Z. TEPEHAN
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Liquid Phase ◽  
Mean Field Theory ◽  
Mean Field ◽  
Eutectic Mixture ◽  
Transition Temperatures ◽  
Isotropic Liquid ◽  
Liquid Phase Transition ◽  
Phase Transition Temperatures

In this work, the effect of thin films on the orientational, thermotropic and optical properties and on the peculiarities of the nematic–isotropic liquid phase transition has been carried out. The planar textures of MBBA+EBBA eutectic mixture on the surfaces coated with Al 2 O 3 and ZrO 2 thin films have been obtained. The optical and thermodynamical parameters of the obtained, oriented textures have been determined. The effect of thin films on the temperature width of heterophase region and on the nematic–isotropic liquid phase transition temperatures has been investigated. The shift of the phase transition temperatures and the change of the temperature width of the heterophase region have been revealed. For the analysis of peculiarities of the nematic–isotropic liquid phase transition and the heterophase regions of this transition, the mean field theory has been used.

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