Directed assembly of nanoparticles monitored by liquid crystal topological defects for advanced optical properties of the composites (Conference Presentation)

2016 ◽  
Author(s):  
Emmanuelle Lacaze
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Topological Defects ◽  
Directed Assembly

scholarly journals Polymer Dispersed Cholesteric Liquid Crystals With a Toroidal Director Configuration under an Electric Field

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 732
Author(s):  
Anna P. Gardymova ◽  
Mikhail N. Krakhalev ◽  
Victor Ya. Zyryanov ◽  
Alexandra A. Gruzdenko ◽  
Andrey A. Alekseev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Electric Field ◽  
Point Defects ◽  
Structural Response ◽  
Optical Filters ◽  
Response Curves ◽  
Polymer Dispersed Liquid Crystal ◽  
Dichroic Dye ◽  
Polymer Dispersed

The electro-optical properties of polymer dispersed liquid crystal (PDLC) films are highly dependent on the features of the contained liquid crystal (LC) droplets. Cholesteric LC droplets with homeotropic boundaries can form several topologically different orientational structures, including ones with single and more point defects, layer-like, and axisymmetric twisted toroidal structures. These structures are very sensitive to an applied electric field. In this work, we have demonstrated experimentally and by computer simulations that twisted toroidal droplets reveal strong structural response to the electric field. In turn, this leads to vivid changes in the optical texture in crossed polarizers. The response of droplets of different sizes were found to be equivalent in terms of dimensionless parameters. In addition, the explanation of this phenomenon showed a comparison of theoretical and experimental structural response curves aids to determine the shape of the droplet. Finally, we demonstrated that the addition of a dichroic dye allows such films to be used as optical filters with adjustable color even without polarizers.

Electronic and electro-optical properties of 5CB and 5CT liquid crystal molecules: A comparative DFT study

Pramana ◽  
2021 ◽  
Vol 95 (2) ◽  
Author(s):  
Dipendra Sharma ◽  
Gargi Tiwari ◽  
Sugriva Nath Tiwari
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Dft Study

Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

2011 ◽  
Vol 1 (5) ◽  
pp. 943 ◽  
Author(s):  
Uladzimir A. Hrozhyk ◽  
Svetlana V. Serak ◽  
Nelson V. Tabiryan ◽  
Timothy J. White ◽  
Timothy J. Bunning
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nonlinear Optical ◽  
Cholesteric Liquid Crystal ◽  
Nonlinear Optical Properties

Study of electro-optical properties of liquid crystal/reactive mesogen-coated liquid crystal display fabricated by slit coater

2014 ◽  
Vol 41 (5) ◽  
pp. 667-672 ◽  
Author(s):  
Yukihiro Nagataki ◽  
Thet Naing Oo ◽  
Takuya Yamamoto ◽  
Katsuyoshi Miyashita ◽  
Hajime Hirata ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Liquid Crystal Display

A new pathway for the formation of radial nematic droplets within a lipid-laden aqueous-liquid crystal interface

RSC Advances ◽  
2014 ◽  
Vol 4 (36) ◽  
pp. 18889-18893 ◽  
Author(s):  
Sumyra Sidiq ◽  
Dibyendu Das ◽  
Santanu Kumar Pal
Keyword(s):  
Liquid Crystal ◽  
Topological Defects ◽  
Soft Materials ◽  
Stimuli Responsive ◽  
First Time ◽  
Crystal Interface

A new pathway for the formation of liquid crystal (LC) droplets with radial LC ordering is reported for the first time in the presence of surfactants and lipids. Interactions of an enzyme with the topological defects in the LC mediate the response of these droplets and thus provide new designs for stimuli-responsive soft materials.

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