Self-Assembly of Block Copolymers in Thin Films Swollen-Rich in Solvent Vapors.

In this study we have employed a polymer processing method based on solvent vapor annealing in order to condense relatively large amounts of solvent vapors onto thin films of block copolymers and thus to promote their self-assembly into ordered nanostructures. As revealed by the atomic force microscopy, a periodic lamellar morphology of poly(2-vinylpyridine)- b -polybutadiene and an ordered morphology comprised of hexagonally-packed structures made of poly(2-vinylpyridine)- b -poly(cyclohexyl methacrylate) were both successfully generated on solid substrates for the first time.