Unconventional 2D Periodic Nanopatterns Based on Block Molecules

This review summarizes the self-assembly of block molecules forming unconventional two-dimensional (2D) periodic nanopatterns. Especially, we emphasize the structural evolution from simple columnar phases to complex 2D tiling morphologies in soft materials including block copolymers, liquid crystals, giant molecules, etc . Then, the state-of-the-art nanofabrication technologies for making sophisticated nanostructures with specific functions via combining both bottom-up assembly and top-down lithography-based methods are discussed, highlighting the use of directed self-assembly processes. Finally, we provide our perspective on this area. By further increasing the complexity of block molecules and the designability of lithography, low-dimensional ordered morphologies will be particularly promising for further application in nanotechnology.