An experimental study of the wettability of rough surfaces over an extremely wide range of roughness is described. The theoretical wettability behavior of an idealized, rough surface agrees well with that of real surfaces. The theoretically predicted minimum in the curve of receding contact angle vs. roughness, for systems of high intrinsic contact angle, is experimentally verified.
Hans‐Jürgen ButtJie LiuKaloian KoynovBenedikt B. StraubChirag HindujaIlia RoismannRüdiger BergerXiaomei LiDoris VollmerW. SteffenMichael Kappl