Preparation method of novel anodic oxidation aluminium template and nano array

A technology of anodizing aluminum oxide and aluminum oxide template, which is applied in the field of electrochemistry

Active Publication Date: 2019-03-22
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The template preparation method is simple, with low requirements on equipment and experimental environment. By changing the electrolyte type, electrolyte concentration, temperature and voltage, anodized alu

Method used

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  • Preparation method of novel anodic oxidation aluminium template and nano array
  • Preparation method of novel anodic oxidation aluminium template and nano array
  • Preparation method of novel anodic oxidation aluminium template and nano array

Examples

Experimental program
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preparation example Construction

[0030] The preparation method of the anodized aluminum template provided by the present invention includes: performing an electrolytic treatment on the polished aluminum sheet; removing the aluminum oxide layer produced by the first electrolysis; preparing polystyrene pellets on the surface of the aluminum substrate; etching the polystyrene Ethylene pellets; deposit a silicon dioxide film on the etched aluminum substrate to remove polystyrene pellets; perform secondary electrolytic treatment on the aluminum substrate to obtain an alumina template, and perform hole expansion on the alumina template.

[0031] 1. Perform an electrolytic treatment on the polished aluminum sheet:

[0032] The selected polished aluminum sheet is mechanically polished and chemically polished in advance, and then subjected to constant voltage DC electrolysis, the electrolyte is 0.3M oxalic acid solution, the working electrode is polished aluminum sheet, the counter electrode is platinum sheet, and the ...

Embodiment 1

[0063] 1. Perform an electrolytic treatment on the polished aluminum sheet:

[0064] The selected polished aluminum sheet is mechanically polished and chemically polished in advance, and then subjected to constant voltage DC electrolysis, the electrolyte is 0.3M oxalic acid solution, the working electrode is polished aluminum sheet, the counter electrode is platinum sheet, and the electrolyte is The temperature was controlled at 7°C, the voltage was 40V, and the electrolysis time was 7h. After electrolysis, the template was rinsed with deionized water to remove residual oxalic acid on the surface, and then dried with a nitrogen gas gun. At this time, a 10 micron thick aluminum oxide layer will be formed on the surface of the polished aluminum sheet.

[0065] 2. Remove the primary oxide layer produced by primary electrolysis:

[0066] The template was immersed in a mixed acid of 6wt% chromic acid and 1.8wt% phosphoric acid at a temperature of 60°C for 8 hours to obtain an alu...

Embodiment 2

[0078] Steps 1-3 are the same as in Example 1.

[0079] 4. Etching polystyrene pellets:

[0080] When using an oxygen plasma cleaner to process polystyrene pellets, the experimental conditions are: the power is 40W, the frequency is 20khz, and the oxygen flow rate is 2sccm. It takes 90 min to etch the polystyrene sphere to 1.3 μm. image 3 b is the SEM image of the polystyrene ball etched to 1.3 μm.

[0081] 5. Inversion of the hexagonal arrangement structure:

[0082] A 250nm silicon dioxide film was magnetron sputtered on the etched template at an experimental speed of 0.5A / s. The polystyrene balls were then glued off with scotch tape, and finally a layer of silicon dioxide film with a hexagonal microporous structure was deposited on the surface of the aluminum substrate.

[0083] 6. Perform secondary electrolytic treatment on the template:

[0084] The aluminum substrate deposited with porous silica arrays was subjected to secondary constant voltage direct current elec...

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Abstract

The invention relates to the technical field of electrochemistry, in particular to a preparation method of an anodic oxidation aluminium template and a nano array. The preparation method of the anodicoxidation aluminium template comprises the following steps: carrying out primary electrolysis treatment on a polished aluminium sheet; removing an aluminium oxide layer generated by primary electrolysis; preparing a polystyrene pellet on the surface of an aluminium substrate; etching the polystyrene pellet; depositing a silicon dioxide film on the etched aluminium substrate and removing the polystyrene pellet; and carrying out secondary electrolysis treatment on the aluminium substrate to obtain an aluminium oxide template, and carrying out pore-enlarging on the aluminium oxide template. Withadoption of the template, an insect compound eye nano array and a nanoflower array are prepared, and the prepared insect compound eye nano array is excellent in hydrophobic property.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a novel anodized aluminum template and a method for preparing a nano-array. Background technique [0002] Nanomaterials have been widely used in various fields, including photonics, metamaterials, electronics, optoelectronics, energy conversion and energy storage, etc. The study of nanoarrays is an important aspect of nanomaterials research. In order to achieve the purpose of preparing nano-arrays in a large area, many technical means have been developed, including photolithography, nano-imprinting, and the use of masks. However, most of these technical means need complex and expensive auxiliary equipment to realize their functions, which limits the application of these technologies to a large extent. Anodized alumina template is a hexagonal alumina porous structure, which is widely used to prepare various nanostructures such as nanopillars, nanowires and nanodots. Th...

Claims

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Application Information

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IPC IPC(8): C25D11/12C25D11/24C23C14/10C23C14/35B82Y40/00
CPCB82Y40/00C23C14/10C23C14/35C25D11/045C25D11/12C25D11/24
Inventor 陈刚胡有地
Owner SHANGHAI TECH UNIV
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