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Contact angle as a function of surface topology (middle column images (B, E, H) are outer surfaces and right-hand column images (C, F, I) are back surfaces) for a PAM synthesized using type I synthesis conditions. (A–C) As-synthesized PAM; (D–F) sample 3. (A, D) SEM images of outer and back (inset) surfaces of these samples. (G) SEM images of the back side and the contact angle for the back side of a PAM (type I) before (inset) and after 7 min of chemical etching before pore opening.
