Abstract
Some fluoro-substituted liquid crystals mixed with arachidic acid in monolayers formed at air-liquid (Langmuir films) and air-solid substrate (Langmuir-Blodgett films) interfaces were investigated. Molecular organization in Langmuir films was determined on the basis of the analysis of the shape of the surface pressure-mean molecular area isotherm and observations made by means of a Brewster angle microscope. It was found that in the compression process the liquid crystal molecules are pushed out towards the top of the first monolayer being in direct contact with the subphase. Langmuir films were transferred onto the quartz substrates at various surface pressures and mono- and multilayered Langmuir-Blodgett films were obtained. The films were characterized using electronic absorption measurements. The conditions for obtaining the homeotropic orientation of the liquid crystal molecules were determined.
Highlights
Liquid crystal displays (LCDs) are still the most dominant displays, which are widely used commercially
In this paper we describe the behavior of the mixtures of some fluoro-substituted liquid crystals with arachidic acid in monolayers formed at air-liquid (Langmuir films) and air-solid substrate
The molecular organization of seven fluorinated liquid crystals mixed with arachidic acid in Langmuir and Langmuir-Blodgett films were studied
Summary
Liquid crystal displays (LCDs) are still the most dominant displays, which are widely used commercially. To stay on the market and be competitive with other types of displays, such as. 2011, 12 plasma display panels (PDPs), field emission displays (FEDs), surface electron-emitter displays (SEDs), organic light emitting diodes (OLEDs), etc., their parameters must be continually improved. Sci. 2011, 12 plasma display panels (PDPs), field emission displays (FEDs), surface electron-emitter displays (SEDs), organic light emitting diodes (OLEDs), etc., their parameters must be continually improved This relates mainly to their disadvantages, such as the relatively narrow viewing angle, long reaction times, the problem of obtaining a deep blackness. The parameters of liquid crystal displays can be improved using new effects and novel liquid crystal materials with pre-designed appropriate physical properties
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