Preparation of Transparent Superhydrophobic Boehmite and Silica Films by Sublimation of Aluminum Acetylacetonate

Superhydrophobic surfaces are those with a water contact angle greater than 150°, and these are desired for various industrial products. Such surfaces have been achieved for boehmite and silica films, which were roughened by the sublimation of aluminum acetylacetonate during calcination. The Figure shows the shape of a water droplet on such a silica film.