Roll-to-Roll Processable PEO-LC Block Copolymer Template Films with Normally Oriented Nanocylinder Array Structures

This paper reports the first demonstration of roll-to-roll coating of a series of poly(ethylene oxide) (PEO)-liquid crystalline (LC) block copolymers by using microgravure coating. Highly ordered hexagonal dot structure was revealed on the whole surface of the coated surface by AFM imaging. Cross sectional TEM observation of the microtomed specimen of the film exclusively exhibited normally oriented PEO nanocylinder array structure, consistent with those prepared in a conventional laboratory procedure by spin-coating, bar coating, and cast.