Self-organized Superstructure and Electronic Properties of a Liquid-crystalline Tetraazapentacene Derivative

2015 ◽  
Vol 44 (2) ◽  
pp. 126-128 ◽  
Author(s):  
Kyosuke Isoda ◽  
Tomonori Abe ◽  
Ippei Kawamoto ◽  
Makoto Tadokoro
Keyword(s):  
Electronic Properties ◽  
Liquid Crystalline ◽  
Self Organized

scholarly journals Travelling colourful patterns in self-organized cellulose-based liquid crystalline structures

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Pedro E. S. Silva ◽  
Ricardo Chagas ◽  
Susete N. Fernandes ◽  
Pawel Pieranski ◽  
Robin L. B. Selinger ◽  
...  
Keyword(s):  
Simple Model ◽  
Temporal Variation ◽  
Liquid Crystalline ◽  
Diffusion Mechanism ◽  
Reaction Diffusion ◽  
Self Organization ◽  
Spatial And Temporal Variation ◽  
Living Matter ◽  
Equilibrium Conditions ◽  
Self Organized

AbstractCellulose-based systems are useful for many applications. However, the issue of self-organization under non-equilibrium conditions, which is ubiquitous in living matter, has scarcely been addressed in cellulose-based materials. Here, we show that quasi-2D preparations of a lyotropic cellulose-based cholesteric mesophase display travelling colourful patterns, which are generated by a chemical reaction-diffusion mechanism being simultaneous with the evaporation of solvents at the boundaries. These patterns involve spatial and temporal variation in the amplitude and sign of the helix´s pitch. We propose a simple model, based on a reaction-diffusion mechanism, which simulates the observed spatiotemporal colour behaviour.

Coupled electric fields in photorefractive driven liquid crystal hybrid cells – theory and numerical simulation

2016 ◽  
Vol 24 (4) ◽  
Author(s):  
P. Moszczyński ◽  
A. Walczak ◽  
P. Marciniak
Keyword(s):  
Numerical Simulation ◽  
Laser Beam ◽  
Electric Fields ◽  
Cell Response ◽  
Liquid Crystalline ◽  
Driving Field ◽  
Self Organized ◽  
Photosensitive Polymer ◽  
Photosensitive Layer ◽  
External Driving

AbstractIn cyclic articles previously published we described and analysed self-organized light fibres inside a liquid crystalline (LC) cell contained photosensitive polymer (PP) layer. Such asymmetric LC cell we call a hybrid LC cell. Light fibre arises along a laser beam path directed in plane of an LC cell. It means that a laser beam is parallel to photosensitive layer. We observed the asymmetric LC cell response on an external driving field polarization. Observation has been done for an AC field first. It is the reason we decided to carry out a detailed research for a DC driving field to obtain an LC cell response step by step. The properly prepared LC cell has been built with an isolating layer and garbage ions deletion. We proved by means of a physical model, as well as a numerical simulation that LC asymmetric response strongly depends on junction barriers between PP and LC layers. New parametric model for a junction barrier on PP/LC boundary has been proposed. Such model is very useful because of lack of proper conductivity and charge carriers of band structure data on LC material.

Self-Organized Anisotropic Wrinkling of Molecularly Aligned Liquid Crystalline Polymer

Langmuir ◽  
2012 ◽  
Vol 28 (7) ◽  
pp. 3576-3582 ◽  
Author(s):  
Seock Hwan Kang ◽  
Jun-Hee Na ◽  
Sung Nam Moon ◽  
Woo Il Lee ◽  
Pil J. Yoo ◽  
...  
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Self Organized

Electronic properties of (Co, Ag) self-organized nano dots on Au(1 1 1) vicinal surfaces

2007 ◽  
Vol 254 (1) ◽  
pp. 45-49 ◽  
Author(s):  
C. Didiot ◽  
Y. Fagot-Revurat ◽  
S. Pons ◽  
B. Kierren ◽  
D. Malterre ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Vicinal Surfaces ◽  
Self Organized

Multifunctional Materials via Molecular Self-Organization into Liquid-Crystalline Phase

2008 ◽  
Vol 47-50 ◽  
pp. 165-168 ◽  
Author(s):  
Suk Wah Tam-Chang ◽  
Delfin Mahinay ◽  
Li Ming Huang
Keyword(s):  
Liquid Crystals ◽  
Organic Compound ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Liquid Crystalline Phase ◽  
Self Organization ◽  
Local Order ◽  
Self Organized ◽  
Polymer Template ◽  
Micrometer Scale

In this paper, we described the synthesis of N,N’-di-(2-ammoniumethyl)perylene- 3,4,9,10-bis(dicarboximide) ditrifluoroacetate (1), an ionic organic compound that self-organized to give chromonic liquid crystals and anisotropic crystals. Using a polymer template with micrometer-scale features to direct the ordered arrangement of 1, patterned structure with micrometer-scale local order was fabricated. The anisotropic (direction-dependent) properties of the crystals and micropatterns of 1 were investigated.

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