scholarly journals Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience

2019 ◽  
Vol 9 (12) ◽  
pp. 2512 ◽  
Author(s):  
Yuan Shen ◽  
Ingo Dierking
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Magnetic Particles ◽  
Research Field ◽  
Lyotropic Liquid Crystal ◽  
Significant Extent ◽  
Functional Nanoparticles ◽  
Optical Shutter ◽  
Different Shapes ◽  
Novel Applications

The research field of liquid crystals and their applications is recently changing from being largely focused on display applications and optical shutter elements in various fields, to quite novel and diverse applications in the area of nanotechnology and nanoscience. Functional nanoparticles have recently been used to a significant extent to modify the physical properties of liquid crystals by the addition of ferroelectric and magnetic particles of different shapes, such as arbitrary and spherical, rods, wires and discs. Also, particles influencing optical properties are increasingly popular, such as quantum dots, plasmonic, semiconductors and metamaterials. The self-organization of liquid crystals is exploited to order templates and orient nanoparticles. Similarly, nanoparticles such as rods, nanotubes and graphene oxide are shown to form lyotropic liquid crystal phases in the presence of isotropic host solvents. These effects lead to a wealth of novel applications, many of which will be reviewed in this publication.

Fabrication and Characterizes of TiO2 Nanomaterials Templated by Lyotropic Liquid Crystal

2011 ◽  
Vol 399-401 ◽  
pp. 532-537
Author(s):  
Li Hua Liu ◽  
Ying Bai ◽  
Fu Min Wang ◽  
Ning Liu
Keyword(s):  
Aqueous Solution ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nonionic Surfactant ◽  
Formation Mechanism ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Micro Structure ◽  
Ft Ir ◽  
Rod Structures

TiO2 nanomaterials were synthesized in lyotropic liquid crystal formed by nonionic surfactant TritonX-100 and TiOSO4 aqueous solution with NH3•H2O as precipitator. The lyotropic liquid crystals were characterized by means of POM and Low-angle XRD. FT-IR, TGA, XRD, TEM were used to characterize the TiO2 samples. It was found that all the lytropic liquid crystal were in lamellar liquid crysal phase and after casting the micro-structure of the LLC phase, the TiO2 samples were self-assemble to form lamellar, sphere and rod structures. According to the characterization results, possible formation mechanism was proposed.

A pirfenidone loaded spray dressing based on lyotropic liquid crystals for deep partial thickness burn treatment: healing promotion and scar prophylaxis

2020 ◽  
Vol 8 (13) ◽  
pp. 2573-2588 ◽  
Author(s):  
Jintian Chen ◽  
Hui Wang ◽  
Liling Mei ◽  
Bei Wang ◽  
Ying Huang ◽  
...  
Keyword(s):  
Wound Healing ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Burn Treatment ◽  
Partial Thickness ◽  
Partial Thickness Burn

This study develops a HA combined lyotropic liquid crystal based spray dressing loaded with pirfenidone for wound healing and scar prophylaxis.

scholarly journals Phase Transitions in Liquid Crystal Doped with Magnetic Particles of Different Shapes

2010 ◽  
Vol 32 (4) ◽  
pp. 807-817 ◽  
Author(s):  
P. Kopčanský ◽  
N. Tomašovičová ◽  
M. Koneracká ◽  
M. Timko ◽  
V. Závišová ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Magnetic Particles ◽  
Different Shapes

Phase Transitions in Liquid Crystal Doped with Magnetic Particles of Different Shapes in Combined Electric and Magnetic Fields

2014 ◽  
Vol 35 (11) ◽  
pp. 2044-2053 ◽  
Author(s):  
Natália Tomašovičová ◽  
Milan Timko ◽  
Vlasta Závišová ◽  
Anežka Hashim ◽  
Jan Jadzyn ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Magnetic Fields ◽  
Magnetic Particles ◽  
Electric And Magnetic Fields ◽  
Different Shapes

Synthesis and Application of the Three-Component Lyotropic Liquid Crystal

2015 ◽  
Vol 1095 ◽  
pp. 371-376
Author(s):  
Qiu Li Yang ◽  
Xin Ran Guan ◽  
Xiao Na Xie ◽  
Shao Wei Wei ◽  
Yi Wen Fang
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Ternary System ◽  
Optical Microscopy ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Polarized Optical Microscopy ◽  
Texture Structure

This paper focused on synthesizing the surfactant lyotropic liquid crystals (LLCs) through mixing the coconut diethanol amide (6501), primary alcobol ethoxylate (AEO9) and water. The LLCs phases formed in the ternary system are thoroughly investigated by polarized optical microscopy (POM). The obtained LLCs were characterized by XRD and SEM in order to analysis the texture, structure and the transformation. In addition, the LLCs have been applied in the preparation of TiO2nanoparticles in our research. The obtained TiO2powder were characterized by XRD and SEM, more importantly, the results showed that the LLCs are effective in the process of synthesizing TiO2nanoparticles.

Location of Phase Boundaries of Lyotropic Liquid Crystal Employing Positron Lifetime Spectroscopy and Electrical Conductivity Measurement

2012 ◽  
Vol 733 ◽  
pp. 127-131
Author(s):  
Ramesh Yadav ◽  
K. Chandramani Singh ◽  
S.R. Choudhary ◽  
P.C. Jain
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Conductivity Measurement ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Ammonium Bromide ◽  
Phase Boundaries ◽  
New Findings ◽  
Positron Lifetime Spectroscopy ◽  
Surfactant Systems

Different compositions of surfactant systems give rise to a rich variety of structures of aggregates. At higher concentrations of surfactant in water, the surfactant molecules aggregate to form lyotropic liquid crystals [1]. In the present work we have prepared two surfactant systems consisting of (i) 20% of cetyl-trimethyl-ammonium-bromide (CTAB) in water, and (ii) 30% of tetra-decyl-trimethyl-ammonium-bromide (TTAB) in water. Both the systems exhibit various lyotropic liquid crystal structures when an increasing amount of co-surfactant is added as third component [2, 3]. These liquid crystalline structures are very sensitive to the solution conditions such as co-surfactant concentration, temperature, ionic strength, counter ion polarizability etc. In this study, positron life time spectroscopy and conductivity measurement have been employed to locate various phases exhibited by the lyotropic liquid crystals. In addition to delineating various phase boundaries of the systems, positron annihilation technique has also yielded new findings.

Composition effect on the aggregate/solution interface of a nematic lyotropic liquid crystal

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 85411-85419 ◽  
Author(s):  
A. R. Ruiz-Fernández ◽  
J. J. López-Cascales ◽  
J. J. Giner-Casares ◽  
R. Araya-Maturana ◽  
F. G. Díaz-Baños ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Composition Effect ◽  
Solution Interface ◽  
Interface Structures

We study how the concentration of phospholipids, decanol and NaCl affects the bilayer and the liquid crystal/solution interface structures of lyotropic nematic liquid crystals.

scholarly journals Recent Advances in Adaptive Liquid Crystal Lenses

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 272 ◽  
Author(s):  
José Francisco Algorri ◽  
Dimitrios C. Zografopoulos ◽  
Virginia Urruchi ◽  
José Manuel Sánchez-Pena
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Focal Length ◽  
Research Field ◽  
Performance Characteristics ◽  
External Stimulus ◽  
Future Prospects ◽  
Advantages And Disadvantages ◽  
Recent Advances ◽  
Active Research

An adaptive-focus lens is a device that is capable of tuning its focal length by means of an external stimulus. Numerous techniques for the demonstration of such devices have been reported thus far. Moving beyond traditional solutions, several new approaches have been proposed in recent years based on the use of liquid crystals, which can have a great impact in emerging applications. This work focuses on the recent advances in liquid crystal lenses with diameters larger than 1 mm. Recent demonstrations and their performance characteristics are reviewed, discussing the advantages and disadvantages of the reported technologies and identifying the challenges and future prospects in the active research field of adaptive-focus liquid crystal (LC) lenses.

Initiator-dependent kinetics of lyotropic liquid crystal-templated thermal polymerization

2021 ◽  
Vol 12 (15) ◽  
pp. 2236-2252
Author(s):  
Younes Saadat ◽  
Kyungtae Kim ◽  
Reza Foudazi
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Thermal Polymerization ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Kinetics Of

In this study, we show that how the locus of initiation can change kinetics and mechanical properties of polymerized lyotropic liquid crystals.

New structure induced by elastic anisotropy in cylindrical nematic liquid crystal

2017 ◽  
Vol 13 (2) ◽  
pp. 4705-4717
Author(s):  
Zhang Qian ◽  
Zhou Xuan ◽  
Zhang Zhidong
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Gennes Theory

Basing on Landau–de Gennes theory, this study investigated the chiral configurations of nematic liquid crystals confined to cylindrical capillaries with homeotropic anchoring on the cylinder walls. When the elastic anisotropy (L2/L1) is large enough, a new structure results from the convergence of two opposite escape directions of the heterochiral twist and escape radial (TER) configurations. The new defect presents when L2/L1≥7 and disappears when L2/L1<7. The new structure possesses a heterochiral hyperbolic defect at the center and two homochiral radial defects on both sides. The two radial defects show different chiralities.

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