Determination of Orientational Order Parameter in Various Liquid-Crystalline Phases

2002 ◽  
Vol 381 (1) ◽  
pp. 1-19 ◽  
Author(s):  
W. Kuczyński ◽  
B. Żywucki ◽  
J. Małecki
Keyword(s):  
Order Parameter ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Orientational Order Parameter ◽  
Crystalline Phases ◽  
Liquid Crystalline Phases

scholarly journals DNA Origami Nano-Sheets and Nano-Rods Alter the Orientational Order in a Lyotropic Chromonic Liquid Crystal

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1695
Author(s):  
Bingru Zhang ◽  
Kevin Martens ◽  
Luisa Kneer ◽  
Timon Funck ◽  
Linh Nguyen ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Dna Origami ◽  
Nano Particles ◽  
Width Ratio ◽  
Disodium Cromoglycate ◽  
Orientational Order Parameter ◽  
Nano Rods

Rod-like and sheet-like nano-particles made of desoxyribonucleic acid (DNA) fabricated by the DNA origami method (base sequence-controlled self-organized folding of DNA) are dispersed in a lyotropic chromonic liquid crystal made of an aqueous solution of disodium cromoglycate. The respective liquid crystalline nanodispersions are doped with a dichroic fluorescent dye and their orientational order parameter is studied by means of polarized fluorescence spectroscopy. The presence of the nano-particles is found to slightly reduce the orientational order parameter of the nematic mesophase. Nano-rods with a large length/width ratio tend to preserve the orientational order, while more compact stiff nano-rods and especially nano-sheets reduce the order parameter to a larger extent. In spite of the difference between the sizes of the DNA nano-particles and the rod-like columnar aggregates forming the liquid crystal, a similarity between the shapes of the former and the latter seems to be better compatible with the orientational order of the liquid crystal.

Orientational order in smectic liquid-crystalline phases of amphiphilic diols

2005 ◽  
Vol 123 (3) ◽  
pp. 034906 ◽  
Author(s):  
Frank Giesselmann ◽  
Roland Germer ◽  
Alexander Saipa
Keyword(s):  
Liquid Crystalline ◽  
Orientational Order ◽  
Crystalline Phases ◽  
Liquid Crystalline Phases
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