Structuring of titania thin films on different length scales via combining block copolymer assisted sol-gel templating with wet-imprinting

Combining wet-imprinting with block copolymer assisted sol-gel chemistry is used to fabricate nanoporous titania films with additional superstructure in the micrometer range on large surface areas. The final film exhibits a hierarchical structure of wavy channels coexisting with a bicontinuous, foam-like nanostructure with pore sizes ranging from 25-45 nm.