In situ prepared polymer films as alignment layers for nematic liquid crystals

2006 ◽  
Vol 100 (12) ◽  
pp. 124916 ◽  
Author(s):  
David Pires ◽  
Yves Galerne
Keyword(s):  
Liquid Crystals ◽  
Polymer Films ◽  
Nematic Liquid Crystals ◽  
Alignment Layers

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 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

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...

scholarly journals Command surfaces 13(1): photoregulation of in-plane alignment of nematic liquid crystals by cinnamate pendant polymer films.

1995 ◽  
Vol 8 (1) ◽  
pp. 75-78 ◽  
Author(s):  
YASUHIRO AKITA ◽  
HARUHISA AKIYAMA ◽  
KAZUAKI KUDO ◽  
YUKO HAYASHI ◽  
KUNIHTRO ICHIMURA
Keyword(s):  
Liquid Crystals ◽  
Polymer Films ◽  
Nematic Liquid Crystals

Photogeneration of high pretilt angles of nematic liquid crystals by azobenzene-containing polymer films

1999 ◽  
Vol 74 (17) ◽  
pp. 2438-2440 ◽  
Author(s):  
Seiichi Furumi ◽  
Masaru Nakagawa ◽  
Shin’ya Morino ◽  
Kunihiro Ichimura ◽  
Hidehiko Ogasawara
Keyword(s):  
Liquid Crystals ◽  
Polymer Films ◽  
Nematic Liquid Crystals ◽  
Pretilt Angles

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
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