Liquid crystalline blue phase materials with three-dimensional nanostructures

2019 ◽  
Vol 7 (43) ◽  
pp. 13352-13366 ◽  
Author(s):  
Jiajia Yang ◽  
Weidong Zhao ◽  
Wanli He ◽  
Zhou Yang ◽  
Dong Wang ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Three Dimensional ◽  
Blue Phase ◽  
Important Progress

This review presents up-to-date important progress in the field of liquid crystalline blue phase (BP) materials.

The temperature range and optical properties of the liquid crystalline blue phase in inverse opal structures

2018 ◽  
Vol 6 (41) ◽  
pp. 11071-11077 ◽  
Author(s):  
Yuxian Zhang ◽  
Weidong Zhao ◽  
Yongbo Yu ◽  
Zhou Yang ◽  
Wanli He ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Three Dimensional ◽  
Inverse Opal ◽  
Optical Performance ◽  
Liquid Crystal Device ◽  
Temperature Range ◽  
Phase Liquid ◽  
Blue Phase

A liquid crystal device was developed by infiltrating a blue phase liquid crystal (BPLC) in three-dimensional SiO2 inverse opal (IOP) structures, of which the BP temperature range and electro-optical performance were investigated.

scholarly journals Retention and deformation of the blue phases in liquid crystalline elastomers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kyle R. Schlafmann ◽  
Timothy J. White
Keyword(s):  
Liquid Crystalline ◽  
Polymer Networks ◽  
Three Dimensional ◽  
Mechanical Deformation ◽  
Phase Iii ◽  
Selective Reflection ◽  
Cholesteric Phase ◽  
Energy Applications ◽  
Blue Phase ◽  
Blue Phases

AbstractThe blue phases are observed in highly chiral liquid crystalline compositions that nascently organize into a three-dimensional, crystalline nanostructure. The periodicity of the unit cell lattice spacing is on the order of the wavelength of visible light and accordingly, the blue phases exhibit a selective reflection as a photonic crystal. Here, we detail the synthesis of liquid crystalline elastomers that retain blue phase I, blue phase II, and blue phase III. The mechanical properties and optical reconfiguration via deformation of retained blue phases are contrasted to the cholesteric phase in fully solid elastomers with glass transition temperatures below room temperature. Mechanical deformation and chemical swelling of the lightly crosslinked polymer networks induces lattice asymmetry in the blue phase evident in the tuning of the selective reflection. The lattice periodicity of the blue phase elastomer is minimally affected by temperature. The oblique lattice planes of the blue phase tilt and red-shift in response to mechanical deformation. The retention of the blue phases in fully solid, elastomeric films could enable functional implementations in photonics, sensing, and energy applications.

An Update on Recent Advances in Cubosome: A Novel Drug Delivery System

2021 ◽  
Vol 21 ◽  
Author(s):  
Madhukar Garg ◽  
Anju Goyal ◽  
Sapna Kumari
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Lipid Bilayers ◽  
Delivery System ◽  
Liquid Crystalline ◽  
Three Dimensional ◽  
Biologically Active ◽  
Potential Applications ◽  
Health Related ◽  
Novel Drug

: Cubosomes are highly stable nanostructured liquid crystalline dosage delivery form derived from amphiphilic lipids and polymer-based stabilizers converting it in a form of effective biocompatible carrier for the drug delivery. The delivery form comprised of bicontinuous lipid bilayers arranged in three dimensional honeycombs like structure provided with two internal aqueous channels for incorporation of number of biologically active ingredients. In contrast liposomes they provide large surface area for incorporation of different types of ingredients. Due to the distinct advantages of biocompatibility and thermodynamic stability, cubosomes have remained the first preference as method of choice in the sustained release, controlled release and targeted release dosage forms as new drug delivery system for the better release of the drugs. As lot of advancement in the new form of dosage form has bring the novel avenues in drug delivery mechanisms so it was matter of worth to compile the latest updates on the various aspects of mentioned therapeutic delivery system including its structure, routes of applications along with the potential applications to encapsulate variety drugs to serve health related benefits.

scholarly journals Advances in Liquid Crystalline Epoxy Resins for High Thermal Conductivity

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1302
Author(s):  
Younggi Hong ◽  
Munju Goh
Keyword(s):  
Thermal Conductivity ◽  
Network Structure ◽  
Epoxy Resins ◽  
Liquid Crystalline ◽  
Random Network ◽  
Three Dimensional ◽  
Heat Insulator ◽  
Liquid Crystalline Epoxy ◽  
Thermally Conductive ◽  
Substantial Interest

Epoxy resin (EP) is one of the most famous thermoset materials. In general, because EP has a three-dimensional random network, it possesses thermal properties similar to those of a typical heat insulator. Recently, there has been substantial interest in controlling the network structure of EP to create new functionalities. Indeed, the modified EP, represented as liquid crystalline epoxy (LCE), is considered promising for producing novel functionalities, which cannot be obtained from conventional EPs, by replacing the random network structure with an oriented one. In this paper, we review the current progress in the field of LCEs and their application to highly thermally conductive composite materials.

Effect of the grain size on hysteresis of liquid-crystalline Blue Phase I

2012 ◽  
Vol 20 (6) ◽  
pp. 318 ◽  
Author(s):  
Prasenjit Nayek ◽  
Heon Jeong ◽  
Shin-Woong Kang ◽  
Seung Hee Lee ◽  
Heung-Shik Park ◽  
...  
Keyword(s):  
Grain Size ◽  
Phase I ◽  
Liquid Crystalline ◽  
Blue Phase

Thermal phase transition behaviours of the blue phase of bent-core nematogen and chiral dopant mixtures under different boundary conditions

Soft Matter ◽  
2014 ◽  
Vol 10 (41) ◽  
pp. 8224-8228 ◽  
Author(s):  
Min-Jun Gim ◽  
Gohyun Han ◽  
Suk-Won Choi ◽  
Dong Ki Yoon
Keyword(s):  
Phase Transition ◽  
Boundary Conditions ◽  
Liquid Crystalline ◽  
Isotropic Phase ◽  
Different Boundary Conditions ◽  
Various Boundary Conditions ◽  
Thermal Phase Transition ◽  
Thermal Phase ◽  
Blue Phase ◽  
Chiral Dopants

We have investigated dramatic changes in the thermal phase transition of a liquid-crystalline (LC) blue phase (BP) consisting of bent-core nematogen and chiral dopants under various boundary conditions during cooling from the isotropic phase.

scholarly journals Liquid-crystalline blue phase III and structures of broken icosahedral symmetry

1993 ◽  
Vol 48 (3) ◽  
pp. 2296-2299 ◽  
Author(s):  
Lech Longa ◽  
Werner Fink ◽  
Hans-Rainer Trebin
Keyword(s):  
Liquid Crystalline ◽  
Phase Iii ◽  
Icosahedral Symmetry ◽  
Blue Phase

Uniform Alignment of Liquid Crystalline Cubic Blue Phase II via Rubbing Treatment

2015 ◽  
Vol 611 (1) ◽  
pp. 186-191 ◽  
Author(s):  
Sunhwan Kim ◽  
Kibeom Kim ◽  
Seong-Yong Jo ◽  
Suk-Won Choi
Keyword(s):  
Phase Ii ◽  
Liquid Crystalline ◽  
Blue Phase

Modelling of form in thermotropic polymers

1994 ◽  
Vol 348 (1686) ◽  
pp. 73-96 ◽  
Keyword(s):  
Liquid Crystalline ◽  
Main Chain ◽  
Three Dimensional ◽  
Point Singularity ◽  
Dimensional Solution ◽  
Crystalline Polymers ◽  
Elasticity Equations ◽  
Lower Total Energy ◽  
Third Dimension ◽  
Crystalline Microstructure

A lattice model of liquid crystalline microstructure has been developed. It provides the basis for the three-dimensional solution of the Frank elasticity equations for given boundary conditions while, in addition, providing a mechanistic representation of the development of texture as the microstructure relaxes with time. It is also able to represent disclination motion and the processes associated with their interaction. In particular, it has been used to study (s = ± 1/2) disclination loops, both those described by a single rotation vector, 17, and those in which 17 has a constant angular relationship with the loop line and are equivalent to a point singularity at a distance much larger than the loop radius. The application of the model to disclinations of unit strength, which are unstable both energetically and topologically, has shown that the decomposition into two 1/2 strength lines of lower total energy occurs much more readily than topological escape in the third dimension. The implication for structures observed in capillary tubes is discussed. The influence on microstructure of a splay constant much higher than that of twist or bend is explored in the context of main-chain liquid crystalline polymers, in particular, the stabilization of tangential +1 lines under such conditions is predicted in accord with observed microstructural features.

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