Pulse laser-induced preparation method of zinc oxide nano-structure

Abstract

The invention relates to the technical field of micro-nano material preparation and laser micro-nano machining, and in particular relates to a pulse laser-induced preparation method of a zinc oxide nano-structure. The zinc oxide nano-structures in different morphologies are prepared by using ultra-short pulse laser to radiate the surface of the zinc-based material in hydrogen peroxide, the method is suitable for a zinc plate or zinc-plated materials adopting different substrates.

Description

technical field [0001] The invention relates to the technical field of micro-nano material preparation and laser micro-nano processing, in particular to a method for preparing zinc oxide nanostructures with different shapes by using ultrashort pulse laser to irradiate the surface of zinc-based materials placed in hydrogen peroxide water. It can be applied to zinc sheet or zinc film materials with different substrates. Background technique [0002] As a wide-bandgap semiconductor material (bandgap of 3.37 eV at room temperature), zinc oxide is widely used in solar cells, short-wave lasers, light-emitting diodes, ultraviolet shields, and gas sensors due to its unique optical, electrical, magnetic, mechanical and catalytic properties. , photocatalysts, etc. have broad application prospects; as we all know, the performance of zinc oxide depends on its structure and size, and its shape and size can be regulated by specific preparation processes, so the search for zinc oxide nanos...

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Problems solved by technology

[0003]At present, the commonly used preparation methods of zinc oxide nanostructures mainly include chemical vapor deposition, hydrothermal method, continuous atomic layer adsorption reaction method, sol-gel method, electro Deposition method, thermal evaporation method, spray pyrolysis method, etc., but due to the complicated preparation process of these methods, the required preparation time is too long (several hours to tens of hours), and some also require toxic and harmful organic additives, often It brings a series of problems such as complex operation process, low preparation efficiency, and easy pollution of the environment. In addition, the controllability is not easy to guarantee when using these methods to prepare zinc oxide nanostructures, and the shape and size of the obtained products are uneven; In technology, there are two main methods for preparing zinc oxide nanostructures by laser-induced method: one is laser-induced decomposition method, that is, the laser irradiates the zinc-containing organic compound solution dropped on the substrate, and the laser is used as the energy source to make the solution Zinc-containing organic compounds are decomposed to form different zinc oxide nanostructures. For example, Fauteux mixed hydrated zinc acetylacetonate with deionized water and denatured ethanol, or mixed zinc acetate dihydrate with methanol, deionized water and monoethanolamine. solution, which were dropped on stainless steel or quartz substrates, and after being irradiated by the 10.6 μm wavelength laser output by the CO2 laser, ZnO nanorods, nanowires, nanoparticles, and nanoneedles were obtained. , nanonails and other structures (see literature: [1] C. Fauteux, R. Longtin, J. Pegna, and D. Therriault. Inorganic Chemistry 46 (2007) 11036~11047; [2] C . Fauteux, M.A.E. Khakani, J. Pegna, and D. Therriault. Applied Physics A 94 (2009) 819~829), but this method needs organic solvents such as methanol, monoethanolamine and zinc Organic compounds are not only relatively expensive, but also harmful to the environment and people, and the quantitative ratio of the solution is also difficult to control; the other is the laser-induced self-organization method, that is, the polishing method placed on the sample stage by laser irradiation Zinc oxide self-organized nanostructures were induced by zinc oxide crystal samples. For example, Guo et al. used a focused 800 nm femtosecond pulsed laser to irradiate the surface of zinc oxide samples and obtained zinc oxide nanostructures with a size of 150–160 nm. Zinc oxide nanoripple (or grating) structure with particles and period of 150~180 nm (see literature: [1] X.D. Guo, R.X. Li, Y. Hang, Z.Z. Xu, B.K. Yu, H.L. Ma, B. Lu, and X.W. Sun. Materials Letters 62 (200 8) 1769~1771; [2] M.J. Zhong, G.L. Guo, J.Y. Yang, N.H. Ma, G. Ye, X.D. Guo, R.X. Li, and H.L. Ma. Chinese Physics B 17 (2008) 1223 ~1226), but the ZnO nanostructures obtained by this method have a single shape, the size is restricted by the laser wavelength, and special optical components such as optical filters, quarter-wave plates, and Glan polarizers are required. complex and relatively expensive

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