Method for preparing multilevel-structure alumina by pattern prefabrication through micro-nano ball arrangement

A technology of micro-nano spheres and alumina, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as low efficiency, high cost, and inability to achieve highly ordered structures

Inactive Publication Date: 2012-01-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina template obtained by the double oxidation method has some defects and cannot achieve a highly ordered structure. Although the methods of imprinting and photolithography can achieve a highly ordered periodic structure, they have high costs, low efficiency, and are not easy to achieve. Realization problem
[0004] Furthermore, existing methods for preparing alumina can only yield hexagonal structures with universal properties

Method used

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  • Method for preparing multilevel-structure alumina by pattern prefabrication through micro-nano ball arrangement
  • Method for preparing multilevel-structure alumina by pattern prefabrication through micro-nano ball arrangement
  • Method for preparing multilevel-structure alumina by pattern prefabrication through micro-nano ball arrangement

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Experimental program
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Effect test

Embodiment 1

[0024] 1. Cut an aluminum sheet with a purity of 99.999% and a thickness of 0.3mm into small pieces of 1cm×2cm, anneal for 4 hours under the protection of high-purity nitrogen at 500°C, take it out and press it flat, and then ultrasonically clean it in acetone for 1 hour. The aluminum sheet treated above was subjected to anodic electrochemical polishing treatment in a mixed solution of ethanol and perchloric acid (volume ratio 4:1) at 4° C. with a voltage of 17 V, and then rinsed with distilled water.

[0025] 2. Patterning process such as figure 1 shown. Select polystyrene microspheres (references: Zhang, J.H.; Chen, Z.; Wang, Z.L.; Zhang, W. Y.; Ming, N.B. Mater. Lett. 2003, 57, 4466-4470) with a particle size of 535 nm. The method of assembling makes it arrange into a monolayer film according to the hexagonal close-packing mode, and the specific method is that the mixed solution of polystyrene microspheres with water and ethanol volume ratio of 1:1 is made into a solution ...

Embodiment 2

[0030] 1. Cut a high-purity aluminum sheet with a purity of 99.999% and a thickness of 0.3mm into small pieces of 1cm×2cm, anneal for 4 hours under the protection of high-purity nitrogen at 500°C, take it out and press it flat, then ultrasonically clean it in acetone for 1 hour . The aluminum sheet treated above was subjected to anodic electrochemical polishing treatment in a mixed solution of ethanol and perchloric acid with a volume ratio of 4:1 at 4°C, and the controlled voltage was 17V, and then rinsed with distilled water.

[0031] 2. The whole patterning process as figure 1 shown. Select silica microsphere 2, adopt the method (X. Yan, J.Yao, G. Lu, X. Chen, K. Zhang, B. Yang, J.Am.Chem.Soc. 2004, 126, 10510. R. Micheletto, H. Fukuda, M. Ohtsu, Langmuir 1995, 11, 3333-3336.) make it orderly arranged on the polished aluminum sheet 1, the arrangement is a hexagonal structure, choose The particle size of the microspheres is 350nm; then the microspheres are etched smaller ...

Embodiment 3

[0034] 1. Cut a high-purity aluminum sheet with a purity of 99.999% and a thickness of 0.3mm into small pieces of 1cm×2cm, anneal for 4 hours under the protection of high-purity nitrogen at 500°C, take it out and press it flat, then ultrasonically clean it in acetone for 1 hour . The aluminum sheet treated above was subjected to anodic electrochemical polishing treatment in a mixed solution of ethanol and perchloric acid with a volume ratio of 4:1 at 4°C, and the controlled voltage was 17V, and then rinsed with distilled water.

[0035] 2. Patterning process such as figure 1 shown. Select 680nm polystyrene microspheres (references: Zhang, J.H.; Chen, Z.; Wang, Z.L.; Zhang, W. Y.; Ming, N.B. Mater. Lett. 2003, 57, 4466-4470), using the method of interface assembly, Make it arranged into a single-layer film according to the hexagonal close-packing method, use the polished aluminum sheet 1 as the substrate, and extract the single-layer film of polystyrene balls; use the method ...

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Abstract

The invention belongs to the technical field of alumina templates, and particularly relates to a method for preparing multilevel-structure alumina by pattern prefabrication through micro-nano ball arrangement. The method particularly comprises the following steps: 1. selecting high-purity aluminium, performing annealing, degreasing, chemical polishing pretreatment; 2. prefabricating a pattern on a pretreated aluminium sheet by micro-nano balls; 3. performing one-step anodic oxidation by using the aluminium substrate completing step 2 as an anode, using inert metal as a cathode, and using phosphoric acid as an electrolyte, selecting a proper voltage according to the morphological size of the prefabricated pattern, and finally performing pore expanding treatment to obtain an alumina template. The alumina template prepared by the method is adjustable according to the pattern structure, has a complex period, and is provided with a multilevel structure. The multilevel period structure is applicable to optical and electronic devices; with reference to properties of photonic crystals, the multilevel structure can be used to realize bandgap regulation.

Description

technical field [0001] The invention belongs to the technical field of alumina templates, and in particular relates to a method for preparing multi-level structured alumina templates by utilizing micro-nano ball arrangement for pattern prefabrication. Background technique [0002] Aluminum oxide film (AAO) is a self-ordered nanoporous material obtained by electrochemically oxidizing high-purity aluminum, and has attracted much attention because of its wide application as a template material in the preparation of multifunctional nanostructures. Choosing different electrolytes and adjusting the voltage can easily control the period of the template, the thickness of the film and the size of the pores, and the size distribution can range from tens of nanometers to hundreds of nanometers. [0003] The existing methods for preparing alumina templates are mainly divided into two types. One is the double oxidation method, that is, after removing the film obtained by the first oxida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25F3/20C23F1/12C23F1/02
Inventor 徐抒平王馨楠徐蔚青李海波
Owner JILIN UNIV
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