Impurities in nematic liquid crystal samples inducing changes in the DSM1-DSM2 transition phase diagram

2000 ◽  
Vol 27 (2) ◽  
pp. 277-281 ◽  
Author(s):  
D. E. Lucchetta ◽  
N. Scaramuzza ◽  
G. Strangi ◽  
C. Versace
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Transition Phase

scholarly journals Effects of droplet size and surfactants on anchoring in liquid crystal nanodroplets

Soft Matter ◽  
2019 ◽  
Vol 15 (19) ◽  
pp. 3914-3922 ◽  
Author(s):  
Zeynep Sumer ◽  
Alberto Striolo
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Droplet Size ◽  
Experimental Studies ◽  
Coarse Grained ◽  
Coarse Grained Simulations

In an attempt to bridge the gap between computational and experimental studies, coarse-grained simulations are used to study nematic Liquid Crystal (LC) nanodroplets dispersed in water. A LC phase diagram is generated as a function of droplet size and temperature, and the effect of adding surfactants is quantified.

Phase Diagram and Photopolymerization Behavior of Mixtures of UV-Curable Multifunctional Monomer and Low Molar Mass Nematic Liquid Crystal

1998 ◽  
Vol 31 (20) ◽  
pp. 6806-6812 ◽  
Author(s):  
Domasius Nwabunma ◽  
Kap Jin Kim ◽  
Yuhui Lin ◽  
L. C. Chien ◽  
Thein Kyu
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Molar Mass ◽  
Uv Curable

Effect of Network Elasticity on Nematic Liquid Crystal/Cross-Linked Polymer Phase Diagram

1999 ◽  
Vol 559 ◽  
Author(s):  
D. Nwabunma ◽  
T. Kyu ◽  
R.T. Pogue ◽  
T.J. Bunning
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Volume Fraction ◽  
Segment Length ◽  
Polymer Phase ◽  
Cross Links ◽  
Network Functionality ◽  
Experimental Diagram

ABSTRACTThe influence of elasticity on the phase behavior of a mixture of nematic liquid crystal (LC) and in-situ cross-linked polymer has been investigated. Unlike the phase diagram of the LC/pre-cured polymer, the experimental diagram of LC/cross-linked polymer phase supported by theoretical calculation showed no critical point. Instead, the binodal curve exhibits an upward asymptotic behavior as the LC volume fraction approaches unity due to domination arising from network elasticity, particularly at high LC volume fraction. An examination of the effect of cross-links segment length and network functionality on the phase diagram of LC/cross-linked polymer showed that the segment length between cross-links exerts a greater influence.

Magnetic Field-Induced Phase Transitions in Ferrofluid Emulsion

1996 ◽  
Vol 10 (23n24) ◽  
pp. 2973-2981 ◽  
Author(s):  
Yun Zhu ◽  
M.L. Ivey ◽  
P. Sheaffer ◽  
J. Pousset ◽  
Jing Liu
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Phase Diagram ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Volume Fraction ◽  
Emulsion System ◽  
Liquid Crystal Phase ◽  
Critical Fields

Two field-induced phase transition regimes are found in a ferrofluid emulsion system, which are defined by three critical fields, Hc1<HC2<Hc3. The first regime, which starts at Hc1 and finishes at Hc2, is the transition from a gas to induced Nematic liquid crystal phase. In the second regime, or Hc2<H<Hc3, induced Nematic liquid crystal transits to columnar solid structure. A phase diagram is drawn and is explained well by a scaling calculation, which gives Hc1~Φ−1/2, Hc2~Φ−1/4, and Hc3~Φγ exp (πG/Φγ/2), where Φ is the volume fraction, γ=0.172 and G=1.44.

Experimental and Theoretical Study of Electroconvection in Homeotropic Nematic Liquid Crystal

2008 ◽  
Vol 59 (2) ◽  
pp. 181-184
Author(s):  
Cristina Miron
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Theoretical Study ◽  
Lorenz Model ◽  
Material Parameters ◽  
Hard Squares ◽  
Unusual Combination ◽  
Linear And Nonlinear ◽  
Combination Of Material

Electroconvection patterns have been studied in a homeotropic nematic liquid crystal, experimental and theoretical, with unusual combination of material parameters, negative conductivity and positive dielectric permittivity anisotropies. Exploring the complete phase diagram in the (U, q) space three distinct morphologies, rolls and squares, soft squares and hard squares have been identified. We perform a linear and nonlinear analysis of the full nematohydrodynamic equations and carry out simulations of a suitably constructed Lorenz model. We obtain in agreement with the experiments modulated rolls and squares at threshold.

Holographic Photopolymerization-Induced Phase Separation in Reference to the Phase Diagram of a Mixture of Photocurable Monomer and Nematic Liquid Crystal

2005 ◽  
Vol 38 (11) ◽  
pp. 4844-4854 ◽  
Author(s):  
Scott Meng ◽  
Thein Kyu ◽  
Lalgudi V. Natarajan ◽  
Vincent P. Tondiglia ◽  
Richard L. Sutherland ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Phase Separation ◽  
Nematic Liquid Crystal
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