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Method of adjusting and controlling length of silver nanowire by utilizing PVP (Polyvinyl Pyrrolidone) of different molecular weights and reaction temperature

A technology of silver nanowires and reaction temperature, applied in the field of nanomaterials, can solve the problems of regulating the length of silver nanowires, and achieve the effect of simple method and low cost

Active Publication Date: 2014-09-17
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report in the literature that combines PVP with different molecular weights and temperature to regulate the length of silver nanowires, which is the problem to be solved by the present invention

Method used

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  • Method of adjusting and controlling length of silver nanowire by utilizing PVP (Polyvinyl Pyrrolidone) of different molecular weights and reaction temperature
  • Method of adjusting and controlling length of silver nanowire by utilizing PVP (Polyvinyl Pyrrolidone) of different molecular weights and reaction temperature
  • Method of adjusting and controlling length of silver nanowire by utilizing PVP (Polyvinyl Pyrrolidone) of different molecular weights and reaction temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Preparation of silver nanowires with a length of 25 μm:

[0020] (1) Preparation of ethylene glycol solution of ferric chloride: Dissolve 0.013g of ferric chloride in 80ml of ethylene glycol and stir evenly;

[0021] (2) Preparation of ethylene glycol solution of PVP: Weigh 0.0680g of PVP with an average molecular weight of 55000, dissolve it in 22ml of ethylene glycol solution, and stir and dissolve on a heating plate at 120°C;

[0022] (3) Preparation of ethylene glycol solution of silver nitrate: Weigh 0.1800g AgNO 3 , dissolve it in 3ml of ethylene glycol solution, and sonicate it for 10min in a sonicator to fully dissolve it;

[0023] (4) Preparation of silver nanowires: Pour the solution obtained in step (2) into a heating mantle, heat and stabilize to 120 °C, and then add a small amount of the solution obtained in step (1) and step ( 3) The prepared solution is kept for 6.5 hours to obtain silver nanowires of about 25 microns.

Embodiment 2

[0025] Preparation of silver nanowires with a length of 100 μm:

[0026] (1) Preparation of ethylene glycol solution of ferric chloride: Dissolve 0.013g of ferric chloride in 80ml of ethylene glycol and stir evenly;

[0027] (2) Preparation of ethylene glycol solution of PVP: Weigh 0.0680g of PVP with an average molecular weight of 1,300,000, dissolve it in 22ml of ethylene glycol solution, and stir and dissolve on a heating plate at 120°C;

[0028] (3) Preparation of ethylene glycol solution of silver nitrate: Weigh 0.1800g AgNO 3 , dissolve it in 3ml of ethylene glycol solution, and sonicate it for 10min in a sonicator to fully dissolve it;

[0029] (4) Preparation of silver nanowires: pour the solution obtained in step (2) into a heating mantle, heat and stabilize to 130 °C, and then add a small amount of the solution obtained in step (1) and step ( 3) The prepared solution is kept for 2.5 hours to obtain silver nanowires of about 100 microns.

Embodiment 3

[0031] Preparation of silver nanowires with a length of 50 μm:

[0032] (1) Preparation of ethylene glycol solution of ferric chloride: Dissolve 0.013g of ferric chloride in 80ml of ethylene glycol and stir evenly;

[0033] (2) Preparation of ethylene glycol solution of PVP: Weigh 0.0680g of PVP with an average molecular weight of 1,300,000, dissolve it in 22ml of ethylene glycol solution, and stir and dissolve on a heating plate at 120°C;

[0034] (3) Preparation of ethylene glycol solution of silver nitrate: Weigh 0.1800g AgNO 3 , dissolve it in 3ml of ethylene glycol solution, and sonicate it for 10min in a sonicator to fully dissolve it;

[0035] (4) Preparation of silver nanowires: pour the solution obtained in step (2) into a heating mantle, heat and stabilize to 140 °C, and then add a small amount of the solution obtained in step (1) and step ( 3) The prepared solution is kept warm for 50 minutes to obtain silver nanowires of about 50 microns.

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Abstract

The invention discloses a method of adjusting and controlling the length of a silver nanowire by utilizing PVP (Polyvinyl Pyrrolidone) of different molecular weights and reaction temperature. The method comprises the following steps of adding little ferric chloride and silver nitrate solution in ethylene glycol solution of the PVP (average molecular weight of 55000-1300000), which is heated at 120-240 DEG C, in 1 minute in sequence, and keeping warm for 0.5 hour to 8 hours to obtain the silver nanowire with the length of 10-100 microns. According to the method, by adopting a salt assisted polyhydric alcohol method, a silver source is added under the assistance of trace salt and the PVP, and the silver nanowires of different lengths are obtained through adjusting and controlling the molecular weight and the reaction temperature of the PVP. The silver nanowire is purified through simple filtration and centrifugation, and the purified silver nanowire can be used for preparing a transparent electrode with high performance. The method is simple and easy, and low in cost, and can be produced in a large scale.

Description

technical field [0001] The invention relates to a method for adjusting the length of silver nanowires by using PVP with different molecular weights and reaction temperature, and belongs to the technical field of nanomaterials. ​ Background technique [0002] Silver nanowires have important application prospects in optoelectronic devices such as touch screens, organic solar cells, displays, especially new-generation flexible electronic devices, due to their good electrical conductivity, thermal conductivity, and toughness. There are many methods for preparing silver nanowires, which are mainly divided into two categories: physical methods and chemical methods, each of which has its own advantages and disadvantages. For example, the physical method is mainly a hard template etching method, which requires a template and has a high cost; the chemical method is mainly a polyol method, which is simple and easy to implement and has a low cost, but the length of the silver n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 冉云霞何微微王可叶长辉
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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