Template Prepared By The One-dimensional Zinc Oxide And Patterned Abs Nanomaterials

As important wide band-gapⅡ-Ⅵsemiconductors, zinc oxide (ZnO) has many potential applications in optical, optoelectronic, conductor, gas sensor and biology. Highly ordered one-dimensional ZnO nanostructures with excellent chemical and thermal stability can be applied in fabricating UV optoelectronic devices and gas sensors.Template method has proven to be appealing because of their easy manipulation and simple equipment. By changing the pore size and thickness of the template, diameter and length of nanomaterial can be controlled manually, which will provide an approach for fabricating nanodevices. Here, many template based ZnO nanostructures with different morphologies have been obtained at different conditions, and characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible absorption (UV-VIS), XRD and EDS. The main contents are as follows:1. Stable ZnO colloid was prepared by sol-gel method using Zn(CH3COO)2-2H2O+ LiOH-H2O and Zn(CH3COO)2-2H2O+KOH, respectively, and the effects of different preparation conditions such as aging time, heat treatment temperatures on the size and crystalline of ZnO nanoparticles were studied. It was found that with the increasing of aging time, the sizes of ZnO nanoparticles increase from the initial narrow size distribution (2-4 nm) to larger sizes. The nanoparticle size also grows larger as the sinter temperature raises. After sintered at 600℃, the radius of hexagonal wurtzite ZnO nanoparticle will increase to 200nm.2. ZnO nanotubes arrays were prepared by an infiltration technique in the nanochannels of anodic alumina membranes(AAO). The effects of the side of the anodic alumina membranes to infiltrate and dissolve, heat treatment temperature on nanotubes were also studied. ZnO nanotube was obtained when the heat temperature exceeds 400℃.The samples at 600℃have ordered nanotube structures, while at 700℃the nozzles of obtained nanotubes are very clear.3. ZnO nanotube arrays were synthesized by direct electrochemical deposition via AAO. It was found that the deposition time was important to the morphology of ZnO nanowires, and ZnO nanotubes were also prepared by controlling of the time of sputtering gold films. The highly ordered ABS nanotube arrays with QDU patterns were successfully fabricated by polymer solution wetting anodic aluminum oxide (AAO) templates via UV-photolithography. The growth mechanism and the electrochemical deposition process were discussed preliminarily.