How the deposition conditions of films of the oxides of semiconductors and metals affect the orientation of liquid crystals

Amosova, L. P.

doi:10.1364/jot.80.000179

Cited by 2 publications

(1 citation statement)

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“…Th e orientation of LC molecules depends on Van der Waalse intermolecular forces and an anisotropic elastic interaction at interfaces with a solid surface [7]. Modern techniques of preparing thin solid fi lms allow to control a pretilt angle and LC molecules alignment by changing a surface morphology and physicochemical properties [8][9][10][11][12][13]. Previous studies established that the orientation of LC molecules on metals surfaces depends on the properties of these materials, thickness of metal fi lms and morphology of metal fi lm surfaces.…”

Section: Introductionmentioning

confidence: 99%

Effect of Granular Silver Films Morphology on the Molecules Orientation and Ion Contamination of Nematic Liquid Crystal

Konshina

Shcherbinin

2017

Bulletin of the MSRU (Physics and Mathematics)

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The structure of granular silver films at the interface of liquid crystal (LC) cells and their influence on LC molecule orientation and ionic contamination are examined. Granular silver films were deposited on a glass substrate covered with an ITO electrode and a-C:H thin films. The morphology structure of the silver films was changed after their annealing at 200 °C. The silver granules became spheroidal with an average diameter of-30 nm and the channel area between them increased. The change in the structure of the Ag films led to an increase in the phase retardation and a decrease in the pretilt angle of the LC director from 51° to 7°. The density of ionic impurities in the LC cell with the annealed silver film was three times more than in the LC cell with the unannealed film. The impact of the alignment of the LC molecules at the surface of the granular silver films on the intensity of the plasmonic peak and its red shift in the absorption spectra is shown.

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