Abstract: Controlling of surface wetting behavior has attracted much attention because of their potential applications. In this work, the intelligent surface of N3 sensitized TiO2 nantube arrays was designed and constructed for optoelectrically cooperative conversion at low critical voltage.  Large-scale hexagonal packing TiO2 nanotube arrays on Ti substrate were fabricated by anodic oxidation method with the average length of 8  μm and inner diameter of about 120 nm.  N3 dyes(Ruthenium dye) were modified on TiO2 nanotubes surface to improve photosensitivity of the composited surface in visible light region.  Fluoroalkyl silane(FAS) was further modified on composite film to improve the surface hydrophobicity with the initial contact angle about 150°. The optoelectrically cooperative wettability conversion of modified TiO2 nanotube was obtained at critical voltage of 10 V, which was reduced by 10 V when only electrical stimulus was used.  The usage of effective N3 dye as photoelectrically sensitive layer and nanotube film with anisotropic wetting behavior resulted in this improvement, which would offer valuable information to the associated research.

Key words: TiO2 nanotube, N3 dye, Optoelectrically cooperation, Wettability conversion; , Anisotropy