Sphere-forming diblock copolymers in slit confinement: A dynamic densityfunctional theory study

摘要

With mean-field dynamic density functional theory, we study the morphologies of sphere-formingdiblock copolymers confined between two homogeneous surfaces. The effects of the film thicknessand the surface field strength on the phase behavior of sphere-forming copolymer film areinvestigated. The morphologies deviating from the bulk sphere-forming structure are revealed,including cylinders oriented perpendicular to the surface, cylinders oriented parallel to the surface,perforated lamellae and lamellae by varying the film thickness, and surface field strength. We alsoconstruct the phase diagram of surface reconstruction, in which some interesting phase transitionsare presented. Besides, we compare the present phase diagram with the relevant phase diagram ofcylinder-forming block copolymer film.