Diblock copolymer phase diagram and morphologies observed for synthetic diblock copolymers. Phases are labeled: L (lamellar), H (hexagonal cylinders), QIa3d (gyroid), QIm3m (body centered cubic spheres), CPS (close-packed spheres), and DIS (disordered). The A–B diblock copolymer is represented by the PS-b-PMMA molecule at the top and depicted as a two-color chain for simplicity. Reproduced with permission from reference 11, 13. Copyright 1996 American Chemical Society. Copyright 2007 ELSEVIER.