scholarly journals Dual wavelength in situ photoalignment for stable planar alignment of nematic liquid crystals

2018 ◽  
Vol 8 (8) ◽  
pp. 2366 ◽  
Author(s):  
Vineet Kumar ◽  
Aboozar Nasrollahi ◽  
Vijay Kumar Baliyan ◽  
Heung-Shik Park ◽  
Myong-Hoon Lee ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dual Wavelength

Polyimide-Free Planar Alignment of Nematic Liquid Crystals: Sequential Interfacial Modifications through Dual-Wavelength in Situ Photoalignment

2019 ◽  
Vol 11 (16) ◽  
pp. 15141-15151 ◽  
Author(s):  
Aboozar Nasrollahi ◽  
Vineet Kumar ◽  
Myong-Hoon Lee ◽  
Shin-Woong Kang ◽  
Heung-Shik Park ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dual Wavelength

scholarly journals Nanocomposites of Polyaniline and Cellulose Nanocrystals Prepared in Lyotropic Chiral Nematic Liquid Crystals

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Dawei Zhang ◽  
Lihong Zhang ◽  
Bingzhe Wang ◽  
Guangzhe Piao
Keyword(s):  
Liquid Crystals ◽  
Cellulose Nanocrystals ◽  
Nematic Liquid Crystals ◽  
Weight Ratio ◽  
Asymmetric Reaction ◽  
Reaction Field ◽  
Electron Microscopies ◽  
Chiral Nematic ◽  
Before And After

Stable lyotropic chiral nematic liquid crystals (N*-LCs) of cellulose nanocrystals (CNs) were prepared via hydrolysis using sulfuric acid. The lyotropic N*-LCs were used as an asymmetric reaction field to synthesize polyaniline (PANI) onto CNs by in situ polymerization. As a primary step, we examined the mesophase transition of the N*-LCs of CNs suspension before and after in situ polymerization of aniline (ANI) by polarizing optical microscopy. The structure of nanocomposites of PANI/CNs was investigated at a microscopic level using Fourier transform infrared spectroscopy and X-ray diffraction. Influence of the CNs-to-ANI ratio on the morphology of the nanocomposites was also investigated at macroscopic level by scanning electron and transmission electron microscopies. It is found that the weight ratio of CNs to aniline in the suspension significantly influenced the size of the PANI particles and interaction between CNs and PANI. Moreover, electrical properties of the obtained PANI/CNs films were studied using standard four-probe technique. It is expected that the lyotropic N*-LCs of CNs might be available for an asymmetric reaction field to produce novel composites of conjugated materials.

scholarly journals Highly Stable, Pretilted Homeotropic Alignment of Liquid Crystals Enabled by In Situ Self-Assembled, Dual-Wavelength Photoalignment

2020 ◽  
Vol 2 (7) ◽  
pp. 2017-2025
Author(s):  
Vineet Kumar ◽  
Zhiqiu Ye ◽  
Haodong Jiang ◽  
Yue Shi ◽  
Ke Li ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Dual Wavelength ◽  
Homeotropic Alignment ◽  
Self Assembled

Neutron Reflectometry-Based In Situ Structural Analysis of an Aligning Agent Additive for the Alignment of Nematic Liquid Crystals on Solid Substrates

Soft Matter ◽  
2022 ◽  
Author(s):  
Fumiya Nemoto ◽  
Norifumi L. Yamada ◽  
Masahiro Hino ◽  
Hiroyuki Aoki ◽  
Hideki Seto
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Structural Analysis ◽  
Nematic Liquid Crystals ◽  
Liquid Crystal Displays ◽  
Neutron Reflectometry ◽  
Initial Alignment ◽  
Solid Substrates

Surface aligning agents, such as amphiphilic surfactants, are widely used to control the initial alignment of nematic liquid crystals (NLCs) in liquid crystal displays (LCDs). Generally, these agents are first...

Tunable backflow in chiral nematic liquid crystals via twist-bend nematogens and surface-localised in-situ polymer protrusions

2017 ◽  
Vol 44 (14-15) ◽  
pp. 2327-2336 ◽  
Author(s):  
Vinay Joshi ◽  
Daniel A. Paterson ◽  
John M. D. Storey ◽  
Corrie T. Imrie ◽  
Liang-Chy Chien
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Chiral Nematic

scholarly journals Making Smectic Defect Patterns Electrically Reversible and Dynamically Tunable Using In Situ Polymer‐Templated Nematic Liquid Crystals

2021 ◽  
Vol 42 (11) ◽  
pp. 2170044
Author(s):  
Giuseppe Boniello ◽  
Victoria Vilchez ◽  
Emmanuel Garre ◽  
Frédéric Mondiot
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals
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