The system of polarization-phase filtering of laser images of liquid-crystal networks of biological fluids

2012 ◽  
Author(s):  
Yuriy A. Ushenko ◽  
O. V. Dubolazov ◽  
M. Sidor ◽  
V. T. Bachynskyi ◽  
O. Y. Wanchuliak
Keyword(s):  
Liquid Crystal ◽  
Biological Fluids ◽  
Polarization Phase

Tailoring the surface of liquid crystal droplets with chitosan/surfactant complexes for the selective detection of bile acids in biological fluids

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70094-70100 ◽  
Author(s):  
Tanmay Bera ◽  
Jinan Deng ◽  
Jiyu Fang
Keyword(s):  
Aqueous Solution ◽  
Liquid Crystal ◽  
Bile Acids ◽  
Biological Fluids ◽  
Optical Probe ◽  
Selective Detection

The surface of 5CB droplets dispersed in aqueous solution is tailored by the adsorption of CHI/SC14S complexes at the 5CB/aqueous interface. The CHI/SC14S complex-coated 5CB droplets can be used as an optical probe to detect CA in biological fluids without dilution.

Polarization-phase tomography of biological fluids polycrystalline structure

2013 ◽  
Author(s):  
A. V. Dubolazov ◽  
O. Ya. Vanchuliak ◽  
M. Garazdiuk ◽  
M. I. Sidor ◽  
A. V. Motrich ◽  
...  
Keyword(s):  
Biological Fluids ◽  
Polycrystalline Structure ◽  
Polarization Phase

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

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