7 October 2014 Contact-angle measurements as a means of probing the surface alignment characteristics of liquid crystal materials on photoalignment layers
Author Affiliations +
Abstract
The exceptionally high 1054-nm laser-damage resistance of photoalignment materials (approaching that of fused silica) has made it possible to fabricate a wide variety of photoaligned liquid crystal (LC) devices for high-peak-power laser applications. Despite these advances, materials selection and photoalignment exposure conditions are still determined using costly and time-consuming “trial-and-error” methods. The contact angle of a fluid droplet on an alignment layer yields important information about LC-surface physicochemical interactions, and as such, it has potential as a rapid and convenient metric for optimizing photoaligned device quality. To this end, we report on efforts to correlate fluid contact angle with surface energy and azimuthal-anchoring energy to aid in the assessment of alignment quality in photoalignment materials systems.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. L. Marshall, O. Didovets, D. Saulnier, "Contact-angle measurements as a means of probing the surface alignment characteristics of liquid crystal materials on photoalignment layers", Proc. SPIE 9182, Liquid Crystals XVIII, 91820J (7 October 2014); doi: 10.1117/12.2062074; https://doi.org/10.1117/12.2062074
PROCEEDINGS
13 PAGES


SHARE
RELATED CONTENT


Back to Top