| 초록 |
A key prerequisite for applications of nanostructured block copolymer (BCP) self-assembly is the ability to generate complex geometries. Multiblock copolymer composed of more than three different chemicals is suitable for discovery of complex morphologies that have never been seen before. Here, we investigated, via SAXS and TEM, the morphologies of polystyrene-b-polyisoprene-b-polystyrene-b-poly(2-vinylpyridine) (S1IS2V, 100k) tetrablock terpolymer. We discovered mixed morphologies with gap between asymmetric lamellae and double arrays of cylinders. This mixed structure consists of asymmetric lamellae and double arrays of cylinders slightly misaligned, and lamellae and cylinders are P2VP, PI respectively. The experimentally observed morphologies are in good agreement with the predicted equilibrium phases by self-consistent filed theory (SCFT). Finally, we were able to develop vertically oriented this mixed pattern by solvent annealing on the substrate. |
