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Method for utilizing alumina template to manufacture silver nanowires

A technology of alumina templates and silver nanowires, applied in the field of nanomaterials, can solve the problems of expensive equipment, uneven particle size, and coarse particle size, and achieve low-cost effects

Active Publication Date: 2014-04-30
NANJING COJINA NEW MATERIAL INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are complicated in technology and long in reaction time, and all have the disadvantages that it is difficult to realize large-scale production. Although the liquid phase reduction method used to prepare silver powder in industry can be produced on a large scale, the disadvantages are also very obvious: expensive equipment, particle size Coarse, the shape is difficult to control, it is difficult to realize the preparation of silver nanomaterials, and the particle size distribution of the product is wide, and the particle size is uneven, ranging from tens of nanometers to tens of microns, which is difficult to meet the requirements of high-performance solar cell silver paste and other electronic components. The product has a higher market demand for silver powder particle size distribution

Method used

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  • Method for utilizing alumina template to manufacture silver nanowires
  • Method for utilizing alumina template to manufacture silver nanowires
  • Method for utilizing alumina template to manufacture silver nanowires

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A kind of method utilizing aluminum oxide template to prepare silver nanowire, comprises the following steps:

[0023] Soak the alumina template in deionized water and sonicate for 10 min to remove air bubbles in the pores of the alumina template. Then, the aluminum oxide template was placed in an ascorbic acid aqueous solution containing polyvinylpyrrolidone for 20 minutes, wherein the mass percent concentration of polyvinylpyrrolidone was 0.5%, and the mass percent concentration of the ascorbic acid aqueous solution was 10%. The reducing agent-soaked alumina template was taken out to dry, and the two surfaces were rinsed with deionized water to remove the reducing agent on the surface of the template.

[0024] Next, the treated alumina template is placed on the surface of the silver nitrate aqueous solution, and under the capillary effect, the silver nitrate solution slowly enters the pores of the template to undergo a reduction reaction to form silver nanowires. Whe...

Embodiment 2

[0027] Yet another method for preparing silver nanowires using an alumina template includes soaking the alumina template in deionized water and ultrasonically treating it for 20 minutes to remove air bubbles in the pores of the alumina template. Then, place the aluminum oxide template in an aqueous hydroquinone solution containing polyvinyl alcohol for 50 minutes, wherein the mass percent concentration of polyvinyl alcohol is 2%, and the mass percent concentration of hydroquinone aqueous solution is 20%. . The reducing agent-soaked alumina template was taken out to dry, and the two surfaces were rinsed with deionized water to remove the reducing agent on the surface of the template.

[0028] Next, the treated alumina template is placed on the surface of the silver fluoride aqueous solution, and under the action of the capillary effect, the silver fluoride solution slowly enters the pores of the template to undergo a reduction reaction to form silver nanowires. Wherein, the ma...

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Abstract

The invention discloses a method for utilizing an alumina template to manufacture silver nanowires. Porous alumina is used as a template. The alumina template goes through ultrasonic treatment first, so that bubbles in holes are removed. Then, the template is soaked in reducing agent aqueous solution containing surfactants. The template is placed on the surface of soluble silver salt aqueous solution after the surfaces of the template are washed. Silver salt slowly goes into the holes under the action of the capillary effect, and reduction reaction occurs, so that the silver nanowires are obtained in the holes. Finally, the alumina template is dissolved, and the silver nanowires are obtained. The method can overcome the defects of other methods for manufacturing the silver nanowries, can be used for manufacturing the silver nanowires with a large draw ratio in a low-cost and efficient mode, and meets the requirements of the opto-electronics.

Description

[0001] technical field [0002] The invention belongs to the field of nanometer materials, in particular to a method for preparing silver nanowires by using an alumina template. Background technique [0003] One-dimensional silver nanomaterials (including silver nanowires and silver nanorod materials) have attracted much attention due to their unique electrical, optical, and thermal properties, as well as their applications in polarizers, photonic crystals, sensors, etc., and have broad market prospects . Using silver nanowires instead of traditional silver powder as conductive filler can reduce filler content by 20% and save costs by 10-15%. It has been found through previous experiments that filling one-dimensional silver nanomaterials in the conductive paste of solar cells can reduce the conductive filler by 10-15%, improve the adhesion of the paste by more than 10%, and reduce the contact resistance of the silver electrode at the same time. The photoelectric convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 琚伟马望京
Owner NANJING COJINA NEW MATERIAL INST CO LTD