Electric and magnetic field-assisted orientational transitions in the ensembles of domains in a nematic liquid crystal on the polymer surface

Using electro- and magneto-optical techniques, we investigated orientational transitions in the ensembles of domains in a nematic liquid crystal on the polycarbonate film surface under the conditions of competing surface forces that favor radial and uniform planar alignment of nematic molecules. Hav...

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Bibliographic Details
Published in:International journal of molecular sciences 2014-10, Vol.15 (10), p.17838-17851
Main Authors: Parshin, Alexander M, Gunyakov, Vladimir A, Zyryanov, Victor Y, Shabanov, Vasily F
Format: Article
Language:English
Subjects:
Electric fields
Electricity
Light
Liquid crystal polymers
Liquid Crystals - chemistry
Magnetic Fields
Materials science
Polycarboxylate Cement - chemistry
Polymers - chemistry
Surface Properties
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Summary:Using electro- and magneto-optical techniques, we investigated orientational transitions in the ensembles of domains in a nematic liquid crystal on the polycarbonate film surface under the conditions of competing surface forces that favor radial and uniform planar alignment of nematic molecules. Having analyzed field dependences of the intensity of light passed through a sample, we established the threshold character of the orientational effects, plotted the calculated intensity versus magnetic coherence length, and compared the latter with the equilibrium length that characterizes the balance of forces on the polymer surface.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms151017838