| 초록 |
Nature is the great source of inspirations for fabricating unique structures with special functions. The termite wing, one of the representative examples of water-repelling surfaces, consists of an array of long hairs and functional nanoarchitecture. In the present study, we introduced a method of realizing hierarchical structures and the water-repellancy of surfaces in terms of contact angle hysteresis. Hierarchical structures were prepared with mixtures of UV-curable polyurethane acrylate (PUA) and silica moiety using replica molding technique, followed by the selective oxygen plasma etching of PUA. In order to achieve enhanced hydrophobicity, the surfaces were treated with fluorinated terminal groups to lower the surface energy. As a result, these hierarchical surfaces showed high water contact angles and extremely low adhesion for water, implying the low contact angle hysteresis at the optimum geometry. |
