AbstractSpecial porous anodic aluminum oxide (AAO) membranes are created on Al in a phosphonic acid electrolyte solution through one‐step anodic oxidation and modified with polydimethysiloxane using a vapor deposition technique. In this context, the anodic oxidation time is tuned during its process. As such, the Al surface's wettability, and self‐cleaning property are controlled by the tunable anodic oxidation time, for the anodic oxidation, time can regulate the structure of the AAO and the proportion of the air‐liquid interface.