| 主权项 |
1. A method of controlling wettability of a surface of an article, the method comprising:
forming an array of nano-structures on the surface, the nano-structures providing a nano-structured surface with a modified wettability characteristic, wherein forming the array of nano-structures on the surface includes:
depositing a first oxidizable material on the surface;depositing a second oxidizable material on the first oxidizable material;anodizing the second oxidizable material to form a porous oxide having nano-pores;anodizing the first oxidizable material so as to at least partially fill the nano-pores with a dense oxide; andremoving the porous oxide, thereby yielding a nano-pillar array on the surface; applying a thin-layer surface coating onto the nano-pillar array to tune wettability of the nano-structured surface from the modified wettabilty characteristic toward a target wettability characteristic, wherein applying the thin-layer surface coating includes forming a first layer on the nano-pillar array, and forming a second layer on the first layer, the first layer being configured to chemically bond the second layer to the nano-pillar array, the second layer being a self-assembled monolayer; wherein:
the first oxidizable material is tantalum, and the nano-pillar array is an array of tantalum pentoxide (Ta2O5) nano-pillars;the second oxidizable material is aluminum;forming the first layer includes depositing hafnium oxide (HfO2) on the nano-pillar array; andforming the second layer includes applying onto the first layer the self-assembled monolayer, the self-assembled monolayer being selected from the group consisting of 1H,1H,2H,2H-perfluorodecyltrichlorosilane (FDTS), heptadecafluoro-1,1,2,2-tetrahydrodecyl trichlorosilane (HDTS), tridecafluoro-1,1,2,2-tetrahydrooctyl trichlorosilane (FOTS) and octadecyltrichlorosilane (OTS). |
