Study Of The Growing Kinetics Of Nanowires Deposited In Template

Two-step preparation technology is used to prepare anodic aluminum oxide (AAO) films by anodizing highly pure aluminum foils in H2C2O4 solution. The morphologies and structures of the obtained AAO films are characterized by transmission electron microscope (TEM), scanning electron microscope (SEM) and X ray diffraction (XRD). Results show that the film has order hexagonal structure and the film is amorphous structure; that the holes are parallel to each other and vertical to the surface of the film; that the diameters of the pores which are on the scale of nanometer have narrow distribution; that the bottom of barrier AAO is made up of arc structure and every arc structure corresponds to a cell of porous AAO. The effects of experimental conditions on quality and size of obtained AAO films are discussed. A new type of agent for stripping aluminum from porous anodic alumina films is researched by the method of the orthogonal experiment. This experimental results show that it is characterized by stable capability, less pollution, simpler operation and good effect of stripping aluminum. The mechanism of the forming of order pores is also discussed. Then deposit Ni nanowires array in nanoholes of AAO films by direct current deposition. XRD shows that during the growing progress Ni prefers to (220) direction and that Ni crystal is cubic structure. TEM spectra of nanowires array show that the length of nanowires is uniform and that the shape of nanowires is the same with that of nanoholes. The length of nanowires can be changed by changing deposition time. Finally, reaction activation energy of Ni growing in nanoholes is determined by experimental data. Results show that Ni growing in the smaller nanoholes is much easier than in the bigger nanoholes.