repellent composite Cassie-Baxter state,15 can cleverly and spontaneously manifest fully wetted Wenzel state16 displaying apparent contact angles of about 0 for almost all the aprotic and protic polar solvents covering an extensive range of surface tension, thus permitting such liquids like water (72.8 mN m21), dimethylformamide (37.4 mN m21), and ethanol (22.1 mN m21) to readily spread and permeate through. Such a clever solvent-responsive wetting and dewetting ability, thereby, make our surfaces ideal candidates not only for effective oil shielding but for highly energy efficient surface self-cleaning17,18 and oil–water separations