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Method for making silver nano wire using aerogel as template

A technology of silver nanowires and aerogels, applied in the field of preparation of silver nanowires, can solve the problems such as the difficulty of obtaining templates, the limitation of pore density and pore length, etc., and achieve the effects of improving efficiency and easy preparation.

Inactive Publication Date: 2003-06-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to find a new template and use this template to prepare silver nanowires for the problems that the template is not easy to obtain in the current nanowire preparation, and the hole density and hole length are limited.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] First, select SiO made by sol-gel and supercritical drying method 2 Aerogel is used as a template for preparing silver nanowires. The pore size of the aerogel is concentrated between 10-30 nm, and the pore size distribution is quite narrow, so the prepared silver nanowires are very uniform. Then, the aerogel was polished into a 2mm thick sheet, washed with commercially available pure water, and dried.

[0024] Then, the above-mentioned cleaned and water-removed template was soaked in a 10% glucose aqueous solution for 30 minutes, taken out and wiped dry with filter paper, and then immersed in a silver ammonia solution containing 3% silver for 30 minutes to make the silver ammonia solution in the SiO 2 The reaction in the holes of the aerogel template generates silver nanowires.

[0025] Finally, take it out, wash with commercially available pure water, wipe off the silver ammonia solution attached to the surface with filter paper, and then immerse it in a concentration of 2...

Embodiment 2

[0027] Firstly, select Al made by sol-gel and supercritical drying method 2 O 3 Aerogel is used as a template for the preparation of silver nanowires. The pore size of the aerogel is concentrated between 60-80 nrn with a fairly narrow distribution and the porosity is greater than 90%. Then, the aerogel was polished into a 1mm thick sheet, washed with commercially available distilled water, and dried.

[0028] Next, soak the cleaned and water-removed template in a 50% glucose aqueous solution for 40 minutes, take it out and wipe dry with filter paper, and then immerse it in a silver ammonia solution containing 5% silver. After 40 minutes, make the silver ammonia solution And glucose in Al 2 O 3 The reaction in the holes of the aerogel template generates silver nanowires.

[0029] Finally, take it out, wash it with commercially available distilled water, wipe off the silver ammonia solution attached to the surface with filter paper, and then immerse it in a concentration of 5mol·l -...

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PUM

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Abstract

The preparation method of silver nano wire by using aerogel as form plate includes the following steps: using inorganic oxide aerogel whose pore size is 10-100 nm, porosity is greater than 90% and pore size is concentrated in 30 nm as form plate, then using abrasive paper to sand it and make it into thin sheet whose thickness is 1-3 nm, cleaning it with pure clean water and drying, then soaking it in glucose aqueous solution whose concentration is 10%-60% for 30-40 min., taking out and wipe-drying with filter paper, and soaking it in silver ammonia liquor whose concentration is 3%-5% for 30-40 min. taking out, cleaning with pure clean water, and wipe-drying and removing silver liquor from surface, finally placing it into sodium hydroxide solution whose concentration is 2-5 mol. 1(-1) and soaking it until the form plate is completely dissolved, and the obtained black powder is the invented siler nano wire.

Description

Technical field [0001] The invention relates to a preparation technology of silver nanowires. Background technique [0002] Nanowires are a linear array of nanostructures based on the material unit of the nanometer (1 billionth of a meter) scale and assembled by physical and chemical methods according to a certain rule. This structural system not only has the characteristics of nano-particles, that is, quantum size effect, small size effect, surface effect, etc., but also has new effects caused by the combination of nanostructures, such as quantum coupling effect and synergistic effect, and it is easy to pass the external field ( (Such as light, electricity, magnetism, etc.) changes to achieve control of its performance. Therefore, it is the basis for the design of a new generation of ultra-micro sub-structure devices, and has been used as a scanning tunnel microscope needle, nanodevice and ultra-large integrated circuit connection, chemical sensor microe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16B22F9/18
Inventor 陈龙武甘礼华成俊杰
Owner TONGJI UNIV
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