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Applied Sciences
Special Issues
Novel Liquid Crystal Materials and Applications
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Novel Liquid Crystal Materials and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 20 May 2024 | Viewed by 3831

Special Issue Editors

Dr. Yuge Huang

E-Mail Website
Guest Editor
Reality Labs, Meta, Redmond, WA 98052, USA
Interests: liquid crystals; polarization optics; AR/VR; micro-displays
Dr. Jianghao Xiong

E-Mail Website
Guest Editor
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
Interests: liquid crystal polarization holograms; AR/VR; light field displays; holographic displays
Dr. Xinyue Zhang

E-Mail Website
Guest Editor
Reality Labs, Meta, Redmond, WA 98052, USA
Interests: polymers; functional materials; interfacial phenomena; dynamic interaction

Special Issue Information

Dear Colleagues,

Liquid crystal (LC), as a smart soft material, has a lot of fascinating properties, including self-assembly, stimuli responsiveness, and birefringence. In the past few decades, LC materials have been widely investigated in state-of-the-art research, serving as enabling technology building blocks. Here, we highlight a few critical and unique properties of LCs and their applications. (1) LC small molecules are mobile and can self-assemble into complex structures, which enable designing and tailoring dynamic material surfaces and interfaces. The thermal-induced and light-induced phase transition enables smart windows with LC shading and actuators with LC elastomers. (2) Sensitive to electric field, magnetic field, temperature, light exposure, and pressure, LC polymers can change the alignment and yield mechanical responses. Therefore, LC-based sensors and actuators have been applied in the fields of soft robotics, flexible electronics, biomedicine, etc. (3) LCs are birefringent, which allows for phase modulation, polarization modulation, and intensity control through the spectrum of UV, visible, infrared, and microwave. The optoelectronic tuning makes LCs a mainstream solution to displays and spatial light modulators. The ability of surface patterning and volume patterning opens the door to flat optics, which significantly reduces the size and weight of AR/VR devices, microscopes, and Lidar sensors. This Special Issue aims to collect innovative work on LC materials and applications to accelerate LC research for science and technology development.

Dr. Yuge Huang
Dr. Jianghao Xiong
Dr. Xinyue Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • liquid crystals
  • polymers
  • interfacial phenomena
  • dynamic interaction
  • functional materials
  • polarization optics
  • polarization holograms
  • displays
  • imaging
  • sensing

Published Papers (2 papers)

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Research

12 pages, 3107 KiB  
Article
Shaping 1,2,4-Triazolium Fluorinated Ionic Liquid Crystals
by Carla Rizzo, Ignazio Fiduccia, Silvestre Buscemi, Antonio Palumbo Piccionello, Andrea Pace and Ivana Pibiri
Appl. Sci. 2023, 13(5), 2947; https://doi.org/10.3390/app13052947 - 24 Feb 2023
Cited by 1 | Viewed by 933
Abstract
The synthesis and thermotropic behaviour of some di-alkyloxy-phenyl-1,2,4-triazolium trifluoromethane-sulfonate salts bearing a seven-carbon atom perfluoroalkyl chain on the cation is herein described. The fluorinated salts presenting a 1,2,4-triazole as a core and differing in the length of two alkyloxy chains on the phenyl [...] Read more.
The synthesis and thermotropic behaviour of some di-alkyloxy-phenyl-1,2,4-triazolium trifluoromethane-sulfonate salts bearing a seven-carbon atom perfluoroalkyl chain on the cation is herein described. The fluorinated salts presenting a 1,2,4-triazole as a core and differing in the length of two alkyloxy chains on the phenyl ring demonstrated a typical liquid crystalline behaviour. The mesomorphic properties of this set of salts were studied by differential scanning calorimetry and polarized optical microscopy. The thermotropic properties are discussed on the grounds of the tuneable structures of the salts. The results showed the existence of a monotropic, columnar, liquid crystalline phase for the salts tested. An increase in the temperature mesophase range and the presence of two enantiotropic mesophases for the sixteen-atom alkyloxy chain salt can be observed by increasing the length of the alkyloxy chain on the phenyl ring. Full article
(This article belongs to the Special Issue Novel Liquid Crystal Materials and Applications)
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12 pages, 3185 KiB  
Article
Reducing the Power Consumption of VR Displays with a Field Sequential Color LCD
by Zhiyong Yang, Yizhou Qian, Junyu Zou, Chia-Lun Lee, Chih-Lung Lin and Shin-Tson Wu
Appl. Sci. 2023, 13(4), 2635; https://doi.org/10.3390/app13042635 - 18 Feb 2023
Cited by 12 | Viewed by 2491
Abstract
To achieve 60 pixels per degree (PPD) and 100° field of view (FoV) while keeping a reasonably high aperture ratio for active-matrix liquid crystal displays (LCDs), field sequential color (FSC) is a promising approach. We evaluate the physical properties of a high birefringence [...] Read more.
To achieve 60 pixels per degree (PPD) and 100° field of view (FoV) while keeping a reasonably high aperture ratio for active-matrix liquid crystal displays (LCDs), field sequential color (FSC) is a promising approach. We evaluate the physical properties of a high birefringence nematic LC mixture and then use these data to simulate the performance of a fringe-field switching (FFS) LCD. Such an FFS LCD exhibits a fast average gray-to-gray response time (~1.5 ms) to enable FSC operation. By removing the spatial color filters, FSC operation triples the resolution density and optical efficiency, which are critical to high-resolution density and low power consumption virtual reality applications. Wide color gamut (96.2% of the DCI-P3 standard) and superior color uniformity are also demonstrated using such an FSC LCD. Full article
(This article belongs to the Special Issue Novel Liquid Crystal Materials and Applications)
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