DNA thermotropic liquid crystals controlled by positively charged catanionic bilayer vesicles

2020 ◽  
Vol 56 (24) ◽  
pp. 3484-3487 ◽  
Author(s):  
Huizhong Liu ◽  
Ling Wang ◽  
Yuanyuan Hu ◽  
Ziang Huang ◽  
Ying Sun ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Catanionic Surfactant ◽  
Thermotropic Liquid Crystal ◽  
Thermotropic Liquid Crystals ◽  
Positively Charged

We report DNA thermotropic liquid crystal (TLC) formation by positively charged catanionic surfactant bilayer vesicles.

Optical-electric properties of poly(amic acid) composite films with a low content of thermotropic liquid crystals

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 56812-56818 ◽  
Author(s):  
Ling Ding ◽  
Yihe Zhang ◽  
Leipeng Liu ◽  
Jianshe Hu ◽  
Fengzhu Lv
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Composite Films ◽  
Amic Acid ◽  
Electric Properties ◽  
Thermotropic Liquid Crystal ◽  
Thermotropic Liquid Crystals

Poly(amic acid) composite films with the thermotropic liquid crystal, 10-cholesteroxy-10-oxocaproic acid (COOA) were developed.

Phase Diagram of Thermotropic Liquid Crystal Including Negative Pressure Region Generated in Metal Berthelot Tube

2011 ◽  
Vol 181-182 ◽  
pp. 22-25
Author(s):  
Kazuki Hiro ◽  
Tadahiro Wada
Keyword(s):  
Phase Diagram ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Crystalline Phase ◽  
Negative Pressure ◽  
Metal Tube ◽  
Thermotropic Liquid Crystal ◽  
Thermotropic Liquid Crystals ◽  
Pressure Region

Phase diagrams including absolute negative pressure regions of thermotropic liquid crystals give useful information on science and technology. A phase diagram was depicted for ca. 40mg of a thermotropic liquid crystal in a pressure vs. temperature (P-T) plane by the Berthelot method using a metal tube. N-I phase transitions occurred even under-10MPa, and a polymorphism of the crystalline phase was observed.

scholarly journals Liquid Crystals Templating

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 648 ◽  
Author(s):  
Mamatha Nagaraj
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Inorganic Materials ◽  
The Self ◽  
Thermotropic Liquid Crystals ◽  
Versatile Technique ◽  
Crystal Phases ◽  
Nanoscale Features ◽  
Mesoporous Membranes ◽  
Liquid Crystal Templating

Liquid crystal templating is a versatile technique to create novel organic and inorganic materials with nanoscale features. It exploits the self-assembled architectures of liquid crystal phases as scaffolds. This article focuses on some of the key developments in lyotropic and thermotropic liquid crystals templating. The procedures that were employed to create templated structures and the applications of these novel materials in various fields including mesoporous membranes, organic electronics, the synthesis of nanostructured materials and photonics, are described.

scholarly journals Novel Trends in Lyotropic Liquid Crystals

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 604 ◽  
Author(s):  
Ingo Dierking ◽  
Antônio Martins Figueiredo Neto
Keyword(s):  
Graphene Oxide ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Soft Matter ◽  
Anisotropic Materials ◽  
Lyotropic Liquid Crystals ◽  
Electro Optic ◽  
Thermotropic Liquid Crystals ◽  
Active Liquid ◽  
Biological Liquid

We introduce and shortly summarize a variety of more recent aspects of lyotropic liquid crystals (LLCs), which have drawn the attention of the liquid crystal and soft matter community and have recently led to an increasing number of groups studying this fascinating class of materials, alongside their normal activities in thermotopic LCs. The diversity of topics ranges from amphiphilic to inorganic liquid crystals, clays and biological liquid crystals, such as viruses, cellulose or DNA, to strongly anisotropic materials such as nanotubes, nanowires or graphene oxide dispersed in isotropic solvents. We conclude our admittedly somewhat subjective overview with materials exhibiting some fascinating properties, such as chromonics, ferroelectric lyotropics and active liquid crystals and living lyotropics, before we point out some possible and emerging applications of a class of materials that has long been standing in the shadow of the well-known applications of thermotropic liquid crystals, namely displays and electro-optic devices.

scholarly journals Length Bidisperse Carbon Nanotubes Dispersions in Thermotropic Liquid Crystals

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
V. Popa-Nita ◽  
S. Buček
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Volume Fraction ◽  
Coupling Term ◽  
Nematic Ordering ◽  
Thermotropic Liquid Crystals ◽  
Phase Ordering

We study nematic liquid crystal driven alignment of carbon nanotubes dispersed in them. We extend the mesoscopic model presented in (P. Van der Schoot et al. 2008, V. Popa-Nita, and S. Kralj 2010) including the effect of length bidispersity of carbon nanotubes. The free energy of the mixture is written as the sum of the Doi free energy for lyotropic nematic ordering of the two carbon nanotubes types, the Landau-de Gennes free energy for the thermotropic ordering of liquid crystal, and the coupling term between liquid crystal molecules and carbon nanotubes. The phase ordering of the mixtures is analyzed as a function of volume fraction, the strength of coupling, and the temperature.

scholarly journals Liquid crystal ionic self-assembly and anion-selective photoluminescence in discotic azatriphenylenes

2020 ◽  
Vol 8 (12) ◽  
pp. 4215-4225 ◽  
Author(s):  
Jia Dai ◽  
Ke-Qing Zhao ◽  
Bi-Qin Wang ◽  
Ping Hu ◽  
Benoît Heinrich ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Discotic Liquid Crystals ◽  
Positively Charged

We report on the straightforward synthesis of a new series of ionic discotic liquid crystals based on positively charged azatriphenylene.

Das Dispiro[5.1.5.1]tetradecan-Gerüst als Baustein für thermotrope Flüssigkristalle / Thermotropic Liquid Crystals Containing the Dispiro[5.1.5.1]tetradecane Unit

1986 ◽  
Vol 41 (8) ◽  
pp. 1011-1014 ◽  
Author(s):  
W. Calaminus ◽  
F. Vögtle ◽  
R. Eidenschink
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Phase Transfer ◽  
Trans Isomers ◽  
Thermotropic Liquid Crystals ◽  
Crystal Phases ◽  
Liquid Crystal Phases

AbstractSeveral 3 .11-disubstituted dispiro[5.1.5.1]tetradecane-7,14-dions were prepared and the cis/trans-isomers were separated. The trans -stereoisomers were converted into the gem-dihalide ketones and mono- and dithioketones. The phase transfer temperatures were determined. Liquid crystal phases were observed.

scholarly journals Transition Temperatures of Thermotropic Liquid Crystals from the Local Binary Gray Level Cooccurrence Matrix

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
S. Sreehari Sastry ◽  
T. Vindhya Kumari ◽  
C. Nageswara Rao ◽  
K. Mallika ◽  
S. Lakshminarayana ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Optical Microscope ◽  
Gray Level ◽  
Transition Temperatures ◽  
Statistical Parameters ◽  
Thermotropic Liquid Crystals ◽  
Phase Transition Temperatures ◽  
Good Agreement

This paper presents a method which combines the statistical analysis with texture structural analysis called Local Binary Gray Level Cooccurrence Matrix (LBGLCM) to investigate the phase transition temperatures of thermotropicp,n-alkyloxy benzoic acid (nOBA,n=4,6,8,10and 12) liquid crystals. Textures of the homeotropically aligned liquid crystal compounds are recorded as a function of temperature using polarizing optical microscope attached to the hot stage and high resolution camera. In this method, second-order statistical parameters (contrast, energy, homogeneity, and correlation) are extracted from the LBGLCM of the textures. The changes associatedwiththe values of extracted parameters as a function of temperature are a helpful process to identify the phases and phase transition temperatures of the samples. Results obtained from this method have validity and are in good agreement with the literature.

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