| 초록 |
In this study, the phase transition of an asymmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) films in the presence of the strong interfacial interactions at polymer/substrate was observed. The order-to-order transition (OOT) and order-to-disorder transition (ODT) in film geometry were influenced by the strong favorable interactions between the P2VP block and substrate, resulting in the thickness-dependent phase diagram including the four different morphologies of a hexagonally modulated layer (HML), a gyroid (GYR), the coexisting HML and GYR structures, and a disordered phase. Morphologies of BCP thin films were investigated by grazing incidence small-angle x-ray scattering (GISAXS) and transmission electron microscopy (TEM). |
