Stable smectic phase in suspensions of polydisperse colloidal platelets with identical thickness
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We report the nematic and smectic ordering in an aqueous suspension of monolayer alpha -Zirconium phosphate platelets possessing a high polydispersity in diameter but uniform thickness. We observe an isotropic-nematic transition as the platelet volume fraction increases, followed by the formation of a smectic, an elusive phase that has been rarely seen in discotic liquid crystals. The smectic phase is characterized by x-ray diffraction high-resolution transmission electron microscopy, and optical microscopy. The phase equilibria in this highly polydisperse suspension are rationalized in terms of a theoretical approach based on density-functional theory.
author list (cited authors)
Sun, D., Sue, H., Cheng, Z., Martínez-Ratón, Y., & Velasco, E.