Infrared Linear Dichroism of Nematic Solutions I. Orientation of Guest Molecules in Nematic Hosts

Jede, F.; Stratmann, A.; Schräder, Bernhard

doi:10.1080/00268948608080158

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…To determine the LC order parameters, we evaluated the infrared linear dichroism of the LC cells with different RM concentrations within the alignment layer using FT-IR (Bruker, Hyperion 3000), as shown in figure 5. The order parameter of the LC was directly determined from the dichroic absorbance of the benzene ring's C=C stretching vibrational band at 1524 cm −1 , which is considered an indication of the orientation of the entire molecule [17]. The order parameter can be expressed by the following equation [18]: where R is the dichroic ratio, and A || and A ⊥ are the absorbance in the directions parallel and perpendicular to the rubbing angle, respectively.…”

Section: Resultsmentioning

confidence: 99%

Fast response time of fringe-field switching liquid crystal mode devices with reactive mesogens in a planar alignment layer

Kim¹,

Lee²,

Kim³

et al. 2013

J. Phys. D: Appl. Phys.

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We report the response time of fringe-field switching (FFS) liquid crystal (LC) mode devices using an ultraviolet-curable reactive mesogen (RM) mixed in a planar alignment layer. The RM polymers within the alignment layer increase the surface azimuthal anchoring energy and the order parameter of the LC molecules. As a result, the falling time and the rising time in the FFS mode are improved by the enhanced azimuthal anchoring energy and the increased dielectric torque induced by higher order parameter of LCs.

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Section: Resultsmentioning

confidence: 99%