Preparation method of metal silver ordered porous array membrane

Abstract

The invention discloses a preparation method of a metal silver ordered porous array membrane. The preparation method comprises the following steps of coating a polystyrene ball solution on a substrate, carrying out plasma etching to obtain a substrate coated with an incompact ordered polystyrene ball template, mixing silver nitrate, hydrofluoric acid and water to obtain a nucleation solution, putting the substrate coated with the incompact ordered polystyrene ball template into the nucleation solution, carrying out horizontal standing sedimentation to obtain silver seed crystal nuclei growing between the polystyrene balls on the substrate, orderly adding ammonia water, acetic acid, hydrazine hydrate and water into the silver nitrate aqueous solution to obtain a growth solution, putting the substrate with the silver seed crystal nuclei growing between the polystyrene balls into the growth solution, carrying out horizontal standing sedimentation to obtain an intermediate product, and putting the intermediate product into a solvent so that the polystyrene balls are dissolved in the solvent and the metal silver ordered porous array membrane is obtained. The preparation method has the characteristics of low cost, simple process and high target product quality.

Description

technical field [0001] The invention relates to a method for preparing an array film, in particular to a method for preparing a metallic silver ordered porous array film. Background technique [0002] The metal silver ordered porous array film has important application prospects in the fields of catalysis and surface-enhanced Raman scattering, and it can also be used to wet-etch silicon materials to obtain ordered silicon nanowire arrays. Recently, people have made unremitting efforts to obtain metal silver ordered porous array membranes, such as "a preparation of metal submicron microsphere array Thin film method and electrodeposition device". The method mentioned in the application document is to obtain an ordered microsphere array film grown on conductive glass through vertical self-assembly of polystyrene microspheres, and use it as a starting template, using the sol-gel method The silicon dioxide macroporous nano-network was synthesized and used as a template in the s...

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Problems solved by technology

However, although this preparation method has obtained the metal silver submicron microsphere array film, there are also shortcomings. First, the quality of the final product is difficult to guarantee. The binding force between styrene microspheres and the substrate is weak, so that when it is put into the solution, the polystyrene microspheres are easy to fall off, causing more defects in the template. In the process, the colloidal solution is used, because the viscosity coefficient of the colloidal solution itself is relatively large, if the polystyrene microsphere film is too thick (that is, there are too many layers of microspheres), the holes between the microspheres at the deep layer will not be completely absorbed. Filling will form many defects; secondly, the preparation process is complicated, time-consuming and energy-consuming. The self-assembly process takes more than 4 days and high-temperature calcination for 5 hours to form the silica inverse opal structure and remove polystyrene microspheres. ; Again, the substrate used not only needs to have good conductivity, but also needs to be surface modified for up to 12 hours; finally, electrodeposition equipment needs to be used for electrodeposition, which increases the cost of preparation

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