Liquid Crystal Nanocomposites and Their Photonics Applications

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Liquid Crystals".

Deadline for manuscript submissions: closed (20 June 2019)

Special Issue Editors


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Guest Editor
College of Aeronautics and Engineering, Kent State University, Kent, USA
Interests: liquid crystals; liquid crystal nanocomposites; phase transitions

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Guest Editor
Department of Applied Physics, Amity Institute of Applied Sciences, Amity University, Noida, U.P., India
Interests: Liquid crystals; Nanomaterials; Liquid crystals nanocomposites; Photonics of Liquid crystals and their nanocomposites

Special Issue Information

Dear Colleagues,

Liquid crystal (LC) phases are most often formed by anisotropic organic molecules. These soft condense matter phases have physical properties that can be tuned via variation in temperature, and optical properties that can be changed by electric/magnetic fields, optical fields, surface morphology, and other relatively weak external perturbations. Among these, electrically tunable optical birefringence is particularly important and forms the basis of ubiquitous liquid crystal displays (LCDs) and other photonic devices. Contemporary display technologies appear to be very mature with incremental changes the norm. However, there is still a need and desire to modify the display parameters of LCDs and invent other possible photonic applications of LCs. In order to achieve these goals, nanomaterials have been found to be an exciting and useful additive to LCs. The dispersion of minute amounts of nanomaterials into different types of LCs has enhanced the display parameters of LCs that could eventually lead to the high performance LCDs and other photonic devices. On the other hand, LCs could also tune the optical properties of nanomaterials by the tunable anisotropic ordering of the LC molecules. In this special issue, we will cover both aspects of liquid crystal nanocomposites i.e. (i) tuning of photonic (i.e. display) properties of LCs by nanomaterials and (ii) tuning of optical properties of nanomaterials by LCs.

Prof. Michael Fisch
Prof. Gautam Singh
Guest Editors

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Keywords

  • Liquid crystals
  • Nanomaterials
  • Liquid crystal nanocomposites
  • High performance tunable photonic devices

Published Papers (2 papers)

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Research

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11 pages, 22506 KiB  
Article
Synergistic Path for Dual Anisotropic and Electrically Switchable Emission From a Nanocomposite of CsPbBr3 Quantum Cuboids and Nematic Liquid Crystal
by Pragnya Satapathy, Pralay K. Santra and S. Krishna Prasad
Crystals 2019, 9(8), 378; https://doi.org/10.3390/cryst9080378 - 24 Jul 2019
Cited by 5 | Viewed by 2866
Abstract
We report photophysical properties of a nanocomposite consisting of perovskite quantum cuboids (QCs) formed by CsPbBr3 and a wide temperature range nematic liquid crystal. Contrary to observations made with conventional II-VI quantum dots dispersed in a liquid crystal, the used QCs form, [...] Read more.
We report photophysical properties of a nanocomposite consisting of perovskite quantum cuboids (QCs) formed by CsPbBr3 and a wide temperature range nematic liquid crystal. Contrary to observations made with conventional II-VI quantum dots dispersed in a liquid crystal, the used QCs form, under the influence of the nematic orientation, linear assemblies over macroscopic length scales evidenced by polarizing optical microscopy. Interestingly, the linear assembly is actually caused by such an anisotropic arrangement at the nm scale, as seen in TEM images. Thin films of the nanocomposite exhibiting this unique and fascinating character exhibit absorption and emission features, which are quite appealing. These include retention of the sharp bandwidth of emission characteristic of the native QCs and establishment of dual anisotropies, arising from the values being different along the director as well in the two directions orthogonal to it. We also present data on voltage-driven switching between one of the anisotropic limits. Full article
(This article belongs to the Special Issue Liquid Crystal Nanocomposites and Their Photonics Applications)
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Review

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16 pages, 2566 KiB  
Review
Impact of Dispersion of Nanoscale Particles on the Properties of Nematic Liquid Crystals
by Shri Singh
Crystals 2019, 9(9), 475; https://doi.org/10.3390/cryst9090475 - 11 Sep 2019
Cited by 24 | Viewed by 3932
Abstract
This work reviews the recent progress made in last decade in understanding the role of dispersion of nanoparticles and quantum dots into host nematic liquid crystals. There are two important ingredients of this work: Even a minute concentration of these non-mesogenic materials in [...] Read more.
This work reviews the recent progress made in last decade in understanding the role of dispersion of nanoparticles and quantum dots into host nematic liquid crystals. There are two important ingredients of this work: Even a minute concentration of these non-mesogenic materials in host matrix can have reflective impact on the dielectric, electro-optical, and spectroscopic properties of host nematics and the nematic-nanoparticles composite systems become suitable for the use in nematic based display and other devices. Full article
(This article belongs to the Special Issue Liquid Crystal Nanocomposites and Their Photonics Applications)
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