Unconventional microdomains of block copolymers

Block copolymers (BCPs) have attracted significant interest due to their ability form various nanostructures, including lamellae, cylinders, gyroids, and spheres. But these nanostructures are only observed for limited range of the volume fraction one block. Namely, lamellar microdomains symmetric fraction, whereas spherical found highly asymmetric fraction. To increase potential applications next-generation lithography, advanced optical materials, high-performance membranes, should beyond limitation During past decades, many directions, such as blends two BCPs, design complex chain architecture BCP introduction favorable interactions between block components, been suggested greatly change phase boundaries conventional nanostructures. In this review, we focus on unconventional inverted cylinders at nearly