Dynamic optical properties of gold nanoparticles/cholesteric liquid crystal arrays

2018 ◽  
Vol 8 (02) ◽  
pp. 550-555 ◽  
Author(s):  
Luciano De Sio ◽  
Ugo Cataldi ◽  
Alexa Guglielmelli ◽  
Thomas Bürgi ◽  
Nelson Tabiryan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Image Position

Abstract

Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

2011 ◽  
Vol 1 (5) ◽  
pp. 943 ◽  
Author(s):  
Uladzimir A. Hrozhyk ◽  
Svetlana V. Serak ◽  
Nelson V. Tabiryan ◽  
Timothy J. White ◽  
Timothy J. Bunning
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nonlinear Optical ◽  
Cholesteric Liquid Crystal ◽  
Nonlinear Optical Properties

scholarly journals Optimized Soft Lithography Method for Polymer Cholesteric Liquid Crystal Flakes Fabrication

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 441 ◽  
Author(s):  
Guanqing Zhou ◽  
Sunqian Liu ◽  
Wei Liu ◽  
Dong Yuan ◽  
Guofu Zhou
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Polyvinyl Alcohol ◽  
Soft Lithography ◽  
Cholesteric Liquid Crystal ◽  
Release Time ◽  
Pdms Mold ◽  
Speed Up ◽  
Liquid Crystal Flakes

Polymer cholesteric liquid crystal (PCLC) flakes are gaining increasing interest for a wide variety of applications because of their unique optical properties and capabilities. Soft lithography is the most effective way to fabricate regularly shaped PCLC flakes. However, it is not easy to peel the flakes from the mold without breaking them. In order to peel the PCLC flakes from the patterned polydimethylsiloxane (PDMS) mold in a convenient way, in this paper, a method of coating a layer of polyvinyl alcohol (PVA) on a PDMS mold was proposed. The influence of the thickness of the PVA layer on the shape of the PCLC flakes and the release time from the PDMS mold were investigated. The results show that the presence of the PVA layer can speed up the release of the PCLC flakes and help maintain the shape effectively. Notably, the utilization of a PVA layer makes the PDMS mold recyclable. The influence of PCLC flake shape was also studied. This work will promote the development of switchable PCLC flake-based technologies.

scholarly journals Multiple-Color Reflectors Using Bichiral Liquid Crystal Polymer Films and Their Applications in Liquid Crystal Displays

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3031
Author(s):  
Cheng-Kai Liu ◽  
Ming-Hsien Li ◽  
Chi-Lun Ting ◽  
Andy Ying-Guey Fuh ◽  
Ko-Ting Cheng
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Polymer Films ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Utilization Efficiency ◽  
Light Sources ◽  
Practical Applications ◽  
Crystal Polymer ◽  
Pitch Length

Multiple-color reflectors using bichiral liquid crystal polymer films (BLCPFs) are investigated. The BLCPFs consist of alternate layers of two different single-pitch cholesteric liquid crystal (CLC) layers, named CLC#A and CLC#B. The thickness of each CLC layer equals its single pitch length. The optical properties in terms of reflections, reflection-wavelength ranges, and distributions of reflection spectra of the BLCPFs that result from the fixed pitch length of CLC#A along with the decrease of the pitch length of CLC#B are qualitatively simulated and investigated. The results indicate that the above optical properties of the BLCPFs depend on the LC birefringence and pitch lengths of CLC#A and CLC#B layers. The concept of fabrication method of the BLCPFs by using polymerizable CLCs and thin films of poly(vinylalcohol) or photoalignment materials is discussed. They have potential practical applications in functional color filters, asymmetrical transmission systems, etc., owing to the multiple reflection bands of BLCPFs. Moreover, the BLCPFs, which can enhance the color gamut and light-utilization efficiency of light sources/LC displays, are reported herein.

scholarly journals Cholesteric liquid crystal self-organization of gold nanoparticles

Soft Matter ◽  
2011 ◽  
Vol 7 (18) ◽  
pp. 8198 ◽  
Author(s):  
Rajaa Bitar ◽  
Gonzague Agez ◽  
Michel Mitov
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Self Organization

Studies on the electro‐optical properties of polymer stabilised cholesteric liquid crystal/aerosil particles composites

2009 ◽  
Vol 36 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Xiaokai Liang ◽  
Hui Cao ◽  
Guohui Pan ◽  
Xiaopeng Cui ◽  
Fasheng Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal

The Effect of CB15 on Cholesteric Liquid Crystal’s Thermal-Optical Properties

2013 ◽  
Vol 807-809 ◽  
pp. 2684-2687
Author(s):  
Hang Jun Ding ◽  
Xue Ting Wang ◽  
Li Na Mu ◽  
Zhou Yang ◽  
Huai Yang
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Optimal Condition ◽  
Nematic Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Pitch Length

A kind of Cholesteric Liquid Crystal was prepared by mixing CB15 with Nematic Liquid Crystal 1717. The influence of CB15 content on the CLC texture, pitch length and thermal optical properties were investigated. The results indicated that the CB15 content affected significantly the CLC texture and the content in the region of 8.0-12.0 wt% were optimal condition for realizing the thermally erase in which texture could be easily changed from scatting focal conic texture to transparent planar one.

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