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Int. J. Mol. Sci. 2011, 12(8), 4923-4945; doi:10.3390/ijms12084923
Article

The Langmuir-Blodgett Technique as a Tool for Homeotropic Alignment of Fluorinated Liquid Crystals Mixed with Arachidic Acid

 and *
Received: 25 May 2011; in revised form: 2 July 2011 / Accepted: 26 July 2011 / Published: 3 August 2011
(This article belongs to the Special Issue Liquid Crystals 2011)
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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.
Keywords: fluoro-substituted liquid crystal; Langmuir film; Langmuir-Blodgett film; Brewster angle microscopy; electronic absorption fluoro-substituted liquid crystal; Langmuir film; Langmuir-Blodgett film; Brewster angle microscopy; electronic absorption
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Modlińska, A.; Bauman, D. The Langmuir-Blodgett Technique as a Tool for Homeotropic Alignment of Fluorinated Liquid Crystals Mixed with Arachidic Acid. Int. J. Mol. Sci. 2011, 12, 4923-4945.

AMA Style

Modlińska A, Bauman D. The Langmuir-Blodgett Technique as a Tool for Homeotropic Alignment of Fluorinated Liquid Crystals Mixed with Arachidic Acid. International Journal of Molecular Sciences. 2011; 12(8):4923-4945.

Chicago/Turabian Style

Modlińska, Anna; Bauman, Danuta. 2011. "The Langmuir-Blodgett Technique as a Tool for Homeotropic Alignment of Fluorinated Liquid Crystals Mixed with Arachidic Acid." Int. J. Mol. Sci. 12, no. 8: 4923-4945.



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