Abstract: Asymmetric porous films, methods of making, and devices. An asymmetric porous film may have a surface layer, which may be an isoporous surface layer, disposed on a substructure, which may be a graded porous substructure that may have mesopores throughout. An asymmetric porous film may be a hybrid asymmetric porous film comprising one or more precursor(s). An asymmetric porous film may include one or more carbon material(s), one or more metalloid oxide(s), one or more metal(s), one or more metal oxide(s), one or more metal nitride(s), one or more metal oxynitride(s), one or more metal carbide(s), one or more metal carbonitrides, or a combination thereof. A method of making an asymmetric porous film may comprise formation of an asymmetric porous film using CA a mixture comprising a multiblock copolymer that can self-assemble and one or more precursor(s).