Method for producing soakage controllable zinc oxide nano-stick array thin film

Abstract

The invention relates to a method for preparing zinc oxide nano-rods array membrane with controllable wettability, which belongs to a field of nano materials. The invention uses zinc acetate sol to prepare adhesive membrane on a basement through spinning technics; a crystal membrane is generated after annealing; the basement is positioned in mixed precursor solution of zinc nitrate and hexamethylene tetrammine and is hydro-deposited for 3-5 hours under a temperature ranging from 90 DEG C to 100 DEG C; the zinc oxide nano-rods array can be prepared on the basement. At the same time, by controlling concentration of the sol, times of spinning, temperature and time of annealing, controllability of the zinc oxide nano-rods array density and controllability of the array wettability can be realized; problem of unsteady wettability of the array can also be overcome.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a preparation technology of nanomaterials with controllable wettability. Background technique [0002] Zinc oxide is a direct bandgap II-VI semiconductor material, its room temperature bandgap can reach 3.37eV, and the exciton binding energy is as high as 60meV, which is one of the important foundations for zinc oxide as an excellent photoelectric emission device material. The reported lasing phenomenon of ZnO nanorod arrays in recent years has aroused people's enthusiasm for the synthesis of one-dimensional highly ordered ZnO nanostructures. The preparation methods of zinc oxide nanorod arrays mainly include gas-solid-liquid growth method (VLS), electrochemical deposition method (ED) and hydrothermal method. In comparison, technologies such as VLS and ED have high requirements on equipment and environment. Examples include substrates that are lattice-matched to the substrate ...

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Problems solved by technology

However, the poor stability of organic matter, especially the sensitivity to temperature, limits the application of this method; the other is to irradiate the array with ultraviolet light, and changing the intensity and irradiation time of ultraviolet light can cause oxygen vacancies to appear on the surface of the array to varying degrees. , also changing the surface chemical composition to obtain arrays with different wettability

However, once the ultraviolet light is removed, the oxygen vacancies and electrons recombine to make the wettability of the array gradually return to the original state, which also limits the application of this method.

[0004] It can be seen that by changing the chemical composition of the array surface to control the wettability of the array, there is a problem that the surface chemical composition is unstable and the wettability of the array will change.

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