Carbon-coated silver nanowire

A technology of silver nanowires and carbon packs, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of affecting the reliability of related devices, increasing the complexity of the process, and increasing the cost of preparation. To achieve the effect of preventing silver migration, preventing the oxidation of nano-silver, and improving the stability

Active Publication Date: 2022-03-08
SHENZHEN HUAKE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the method of preparing silver nanowires is mainly wet chemical reduction method represented by polyol method, which will inevitably introduce various chemical reagents, such as organic alcohols, PVP, halogen / bromide, etc., and its reaction process is complex, High cost and poor environmental friendliness
[0003] During the use of silver nanowires, due to reasons such as oxidation and silver migration effects, their stability will be poor, which will affect the reliability of related devices. At present, the commonly used solution is to coat the surface of silver nanowires after synthesis, such as graphite ene, zinc oxide, etc., but this process will increase the complexity of the process and lead to an increase in production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Collect sorghum, wash it with water and ethanol in sequence, and dry it overnight in an oven at 45°C;

[0036] (2) Take by weighing 2 mg of silver sulfate, dissolve it in 8 mL of water, stir fully to make it dissolve completely, and prepare a 0.25 mg / mL silver sulfate solution;

[0037] (3) Transfer the silver sulfate solution in step (2) to a 10 mL reaction kettle, add 2 mg of sorghum dried in step (1), seal the reaction kettle, and react at 100° C. for 8 hours;

[0038] (4) After the reaction is finished and the temperature is naturally lowered, the reaction product is collected, washed and dried by centrifugation, and the carbon-coated silver nanowire is obtained. Its SEM and TEM characterization pictures are as follows Figure 1-3 shown.

[0039] By observing the shape of carbon-coated silver nanowires using a scanning electron microscope (SEM), see figure 1 As shown, the carbon-coated silver nanowires are all linear structures with a relatively high aspect r...

Embodiment 2

[0042] (1) Collect the bamboo, wash it with water and ethanol in turn, and dry it overnight in an oven at 60°C;

[0043] (2) Take silver nitrate 150mg, be dissolved in 160mL water, fully stir it and make it dissolve completely, prepare 0.94mg / mL silver nitrate solution;

[0044] (3) Transfer the silver nitrate solution in step (2) to a 200mL reaction kettle, add 16mg of dried bamboo in step (1), seal the reaction kettle, and react at 150°C for 10h;

[0045] (4) After the reaction is finished and the temperature is naturally lowered, the reaction product is collected, washed and dried by centrifugation, and the carbon-coated silver nanowire is obtained. Its SEM and TEM characterization pictures are as follows Figure 4-6 shown.

[0046] The shape of the carbon-coated silver nanowires is observed with reference to the test method of Example 1. The carbon-coated silver nanowires are all linear structures with a relatively high length and diameter, and the shape is uniform; coa...

Embodiment 3

[0048] (1) Collect the lotus leaves, wash them with water and ethanol in turn, and dry them overnight in an oven at 80°C;

[0049] (2) Take by weighing 500 mg of silver sulfate, dissolve it in 400 mL of water, stir fully to make it dissolve completely, and prepare a 1.25 mg / mL silver sulfate solution;

[0050] (3) Transfer the silver sulfate solution in step (2) to a 600mL reaction kettle, add 120mg of dried lotus leaves in step (1), seal the reaction kettle, and react at 200°C for 12h;

[0051] (4) After the reaction is finished and the temperature is naturally lowered, the reaction product is collected, washed and dried by centrifugation, and the carbon-coated silver nanowire is obtained. Its SEM and TEM characterization pictures are as follows Figure 7-9 shown.

[0052] The shape of the carbon-coated silver nanowires is observed with reference to the test method of Example 1. The carbon-coated silver nanowires are all linear structures with a relatively high length and dia...

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Abstract

The invention belongs to the technical field of silver nanowire preparation, and particularly relates to a carbon-coated silver nanowire. The carbon-coated silver nanowire comprises a silver nanowire positioned on a core layer and a nano carbon layer coated on the surface of the core layer; the diameter of the silver nanowire is 10 to 2000 nm, and the length of the silver nanowire is 1 to 100 [mu] m; and the thickness of the nano carbon layer is 1 to 10 nm. According to the carbon-coated silver nanowire disclosed by the invention, the surface of the silver nanowire is coated with the nano-carbon layer, so that oxidation of nano-silver and a silver migration effect can be well prevented, the stability of the silver nanowire is improved, and the reliability of a related silver nanowire device is ensured; moreover, the carbon-coated silver nanowire is uniform in shape and stable in coating, and has good application value.

Description

technical field [0001] The invention belongs to the technical field of silver nanowire preparation, and in particular relates to a carbon-coated silver nanowire. Background technique [0002] In recent years, one-dimensional nanowire materials have been widely used in energy, catalysis, biology, electronics and other fields due to their unique mechanical, electrical, thermal, optical and other properties. Among them, metallic silver nanowires have attracted extensive research because of their excellent electrical and thermal conductivity and mechanical properties. At present, the method of preparing silver nanowires is mainly wet chemical reduction method represented by polyol method, which will inevitably introduce various chemical reagents, such as organic alcohols, PVP, halogen / bromide, etc., and its reaction process is complex, The cost is high, and the environmental friendliness is poor simultaneously. [0003] During the use of silver nanowires, due to reasons such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/054B22F1/16B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00
Inventor 曾西平叶晃青李艳玲林仪珊
Owner SHENZHEN HUAKE COMM TECH CO LTD
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