scholarly journals Photoinduced Surface Relief Grating on Polysilane Thin Films and its Application to Alignment Layer for Liquid Crystal Cells

2003 ◽  
Vol 16 (1) ◽  
pp. 97-99 ◽  
Author(s):  
Kimihiro Matsukawa ◽  
Tohru Nanba ◽  
Yukihito Matsuura ◽  
Hiroyoshi Naito
Keyword(s):  
Thin Films ◽  
Liquid Crystal ◽  
Surface Relief ◽  
Alignment Layer ◽  
Surface Relief Grating ◽  
Crystal Cells

Direct quantitative imaging of the writing stage in a photosensitive azopolymer by digital holography

Soft Matter ◽  
2019 ◽  
Vol 15 (39) ◽  
pp. 7809-7813 ◽  
Author(s):  
V. Pagliarulo ◽  
A. Calabuig ◽  
S. Grilli ◽  
P. Ferraro
Keyword(s):  
Thin Films ◽  
Real Time ◽  
Surface Relief ◽  
Digital Holography ◽  
Light Exposure ◽  
Quantitative Imaging ◽  
Continuous Light ◽  
Full Field ◽  
Surface Relief Grating

In this paper, we demonstrated that the gradual formation of a surface relief grating (SRG) in azopolymer thin films under continuous light exposure could be directly observed in situ and in real-time, allowing full-field characterization.

Tunable topographical cellulose matrices for electro-optical liquid crystal cells

2006 ◽  
Vol 14 (4) ◽  
Author(s):  
I. Costa ◽  
P. Almeida ◽  
D. Filip ◽  
J. Figueirinhas ◽  
M. Godinho
Keyword(s):  
Thin Films ◽  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Cellulose Derivatives ◽  
Free Standing ◽  
Casting Technique ◽  
Solvent Vapour ◽  
Preparation Conditions ◽  
And Control ◽  
Crystal Cells

AbstractIn this work we have used acetoxypropylcellulose (APC) to produce free standing solid films (∼60 μm) that were used for assembling electro-optical devices. Thin films were obtained from concentrated lyotropic solutions of cellulose derivatives. Induced by the cast and shearing preparation conditions wrinkles and band textures can be observed in their free-surface plane. In order to eliminate and control these textures we used a process similar to that introducted in literature [1] which consists of storing the films in the same solvent-vapour atmosphere as the solution system. Lyotropic APC liquid crystalline solutions in dymethylacetamide (DMA) with crosslinker were prepared, thin films were obtained by using a shear/casting technique and stored in the solvent-vapour atmosphere until a planar structure was achieved. The dried crosslinked films were analyzed by optical polarised microscopy (POM) and scanning electron microscopy (SEM). The films with different topographies were used to produce optical cells composed by the cellulose derivative film covered on both free surfaces by a layer of the nematic liquid crystal E7 and placed between two transparent conducting substrates. The electro-optical properties of these cells were obtained.

scholarly journals Surface relief grating growth in thin films of mexylaminotriazine-functionalized glass-forming azobenzene derivatives

2015 ◽  
Vol 39 (12) ◽  
pp. 9162-9170 ◽  
Author(s):  
Othmane R. Bennani ◽  
Tayel A. Al-Hujran ◽  
Jean-Michel Nunzi ◽  
Ribal Georges Sabat ◽  
Olivier Lebel
Keyword(s):  
Thin Films ◽  
Surface Relief ◽  
Surface Relief Grating ◽  
Glass Forming ◽  
Azobenzene Derivatives

A series of glass-forming azobenzene derivatives with varying absorption ranges were synthesized, and their photomechanical properties were compared.

Experimental study of liquid-crystal alignment on a surface relief grating

Laser Physics ◽  
2006 ◽  
Vol 16 (8) ◽  
pp. 1197-1201 ◽  
Author(s):  
A. Madani ◽  
H. Khoshsima ◽  
H. Tajalli ◽  
S. Ahmadi
Keyword(s):  
Experimental Study ◽  
Liquid Crystal ◽  
Surface Relief ◽  
Surface Relief Grating ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment

PEDOT as an alignment layer and electrode in AFLC devices

2009 ◽  
Vol 17 (1) ◽  
Author(s):  
D.P. Medialdea ◽  
N. Bennis ◽  
B. Cerrolaza ◽  
X. Quintana ◽  
J.M. Otón ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Counter Electrode ◽  
Light Emission ◽  
Optical Response ◽  
Alignment Layer ◽  
Organic Light ◽  
Crystal Cells

AbstractPEDOT [Poly (3, 4-ethylenedioxythiophene) poly (styrenesulfonate)] is a material typically used organic light emission displays (OLEDs) manufactured as a conductor, or rather, as a hole injector. In this paper, three different issues have been studied: the use of rubbed PEDOT as alignment layer, the resistivity of the applied PEDOT layers, i.e., its potential as a replacement of ITO electrodes, and the induction of asymmetry in the electro-optical response of liquid crystal cells by assembling the display with dissimilar coated aligning surfaces — PEDOT on one side and buffed nylon on the counter electrode

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