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Method for adjusting and controlling diameter of silver nanowire through dosage of sodium chloride

A technology of silver nanowires and sodium chloride, applied in the direction of nanotechnology, can solve the problems of changing the length of silver nanowires, and achieve the effects of low cost, simple preparation process, and mild reaction conditions

Active Publication Date: 2015-03-25
山东利特纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent 201110311631.1 discloses a method for preparing metallic silver nanowires with adjustable length and diameter, but this method has the following two defects: (1) This method changes the diameter of silver nanowires while changing the diameter of silver nanowires. (2) The minimum diameter of the silver nanowires obtained by this method is only 80 nanometers

Method used

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  • Method for adjusting and controlling diameter of silver nanowire through dosage of sodium chloride
  • Method for adjusting and controlling diameter of silver nanowire through dosage of sodium chloride
  • Method for adjusting and controlling diameter of silver nanowire through dosage of sodium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of silver nanowires with a diameter of 30 nm

[0029] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0030] (2) Add 4.4mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol to a 250mL three-neck round-bottom flask in sequence, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0031] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0032] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 30 nanometers and a length of 2-20 micrometers.

Embodiment 2

[0034] Preparation of silver nanowires with a diameter of 40 nm

[0035] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0036] (2) Add 17.7mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol in sequence to a 250mL three-neck round-bottom flask, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0037] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0038] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 40 nanometers and a length of 2-20 micrometers.

Embodiment 3

[0040] Preparation of silver nanowires with a diameter of 60 nm

[0041] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0042] (2) Add 35.4mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol to a 250mL three-neck round-bottom flask in sequence, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0043] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0044] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 60 nanometers and a length of 2-20 micrometers.

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Abstract

The invention relates to a method for adjusting and controlling the diameter of a silver nanowire through the dosage of sodium chloride. The method is realized through the following measures: (1) 0.47 g of silver nitrate, 0.2 mL of water and 1mL of glycerin are mixed and dissolved at the room temperature to be prepared into a solution A; (2) 1-100 mg of sodium chloride, 2.1 g of polyvinylpyrrolidone and 59 mL of glycerin are successively added to a three-neck round-bottomed flask of 250 mL so as to be prepared into a solution B; (3) the solution A is added into the solution B, heat preservation is performed for 15 minutes to 4 hours at the temperature of 160-200 DEG C, centrifugation is performed on the reaction liquid, and lower-layer sediment is cleaned so as to obtain the silver nanowire. The method disclosed by the invention uses a polyalcohol reduction method as a basis, and the diameter of the metal silver nanowire can be conveniently adjusted and controlled by simply changing one parameter, namely the dosage of the sodium chloride; the preparation process is simple, the protection of inert gas is not needed, the reaction conditions are mild, the cost is low, and used chemical medicines are green, environmental friendly and harmfulless, so that the method is suitable for large-scale industrialized production.

Description

technical field [0001] The invention relates to a method for adjusting and controlling the diameter of silver nanowires through the dosage of sodium chloride, and belongs to the technical field of silver nanowire materials. Background technique [0002] Silver nanowire is a new type of one-dimensional nano-noble metal material. Compared with particle-shaped nanomaterials, silver nanowires have the characteristics of large specific surface area, high surface activity, excellent electrical conductivity, and excellent catalytic performance, as well as a unique surface plasmon resonance effect. At present, this material has been widely used in transparent conductive electrodes, flexible display screens, surface-enhanced Raman technology, biomarkers, imaging and biodetection technologies, functional nanodevices and other fields, and has received widespread attention worldwide. [0003] Many scientific research results have proved that the shape and size of nanomaterials have a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 郑逸群姚茂茂孙明娟
Owner 山东利特纳米技术有限公司
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