scholarly journals Magnetic-field-aligned Liquid Crystal Matrix for Raman Spectroscopy.

1992 ◽  
Vol 41 (3) ◽  
pp. 183-185
Author(s):  
Taeko I. Urano ◽  
Hiro-o Hamaguchi
Keyword(s):  
Magnetic Field ◽  
Raman Spectroscopy ◽  
Liquid Crystal ◽  
Crystal Matrix ◽  
Liquid Crystal Matrix

Effects of Gold Nanoparticle Dispersion in a Chiral Liquid Crystal Matrix

2013 ◽  
Vol 572 (1) ◽  
pp. 59-65 ◽  
Author(s):  
M. Infusino ◽  
A. De Luca ◽  
F. Ciuchi ◽  
A. Ionescu ◽  
N. Scaramuzza ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Gold Nanoparticle ◽  
Nanoparticle Dispersion ◽  
Crystal Matrix ◽  
Chiral Liquid Crystal ◽  
Liquid Crystal Matrix

scholarly journals Magnetic field induced orientational transitions in liquid crystals doped with carbon nanotubes

2017 ◽  
Vol 8 ◽  
pp. 2807-2817 ◽  
Author(s):  
Danil A Petrov ◽  
Pavel K Skokov ◽  
Alexander N Zakhlevnykh
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Continuum Theory ◽  
Weakly Coupled ◽  
Transitions In Liquid Crystals ◽  
The Matrix ◽  
Liquid Crystal Matrix ◽  
Planar Phase ◽  
Orientational Transitions

We propose a continuum theory of orientational phase transitions induced by an external magnetic field in a suspension of carbon nanotubes in a nematic liquid crystal. It is shown that in a magnetic field a non-uniform and two different uniform phases are possible in the suspension. The uniform phases of the suspension differ by the type of orientational coupling of nanotubes with the liquid crystal matrix (the planar type when the nanotubes are oriented along the matrix director, and the homeotropic type when the nanotubes are perpendicular to the director). The possibility of a redistribution of the nanotube concentration (segregation effect) is shown. The fields of orientational transitions between uniform and non-uniform phases of the suspension are found analytically. It is shown that, when the nanotubes are weakly coupled to the matrix, the magnetic field induces reentrant transitions (uniform planar phase–non-uniform phase–uniform homeotropic phase–non-uniform phase). These transitions can be of first or of second order depending on the carbon nanotubes segregation intensity.

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