Mixtures of liquid crystals (LCs) are widely used in technological applications in order to tailor the overall properties to the environmental and operational requirements. Surface active dopants can have useful properties, for example, Bryan-Brown et al. have noticed the adsorbed layer causes a weakening of the director anchoring of the bulk nematic, which in turn allows for faster switching of orientation in an electric field. Fluorinated LCs are attracting an increasing amount of interest owing to the wide variety of properties functioanlisation with fluorine can affect. Strong adsorption was seen in the system of a fluorinated dopant LC in 4'-pentyl-4-cyanobiphenyl (5CB) at the interface with air, whereas no adsorption was evident at a solid surfactant (CTAB) treated surface.

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Last edited: Friday September 10, 2010

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