Effect of a fluorescent dye on cholesteric droplets on a glass substrate

Abstract

We investigated an effect of a fluorescent dye, Rhodamine 6G, on cholesteric (Ch) LC droplets on a glass substrate when they are coexisting with the isotropic phase. Depending on the dye concentration, the Ch droplets often change the direction of helical axis with respect to the substrate plane, which, we suppose, should be ascribed to the anchoring condition. In this study, we focused on the contact angle of the Ch droplets on various substrates and measured its dependence on the dye concentration.