Figure 1.

Schematic illustration of the fabrication process of hybrid organic–inorganic–organic isoporous membranes. Polystyrene‐block‐poly(4‐vinylpyridine) (PS‐b‐P4VP) membrane is modified by SIS with selectively binding an organometallic precursor, followed by exposure to a co‐reactant precursor, resulting in growth of AlO_x within the P4VP domains. To further reduce the pore size, AlO_x ALD is performed. The AlO_x‐treated membrane is then postfunctionalized via silanization to introduce different functionalities, i.e., fluorinated groups and cationic and anionic groups.