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Synthesis for mono-crystal silver nano wire

A technology of silver nanowires and synthesis methods, applied in the field of nanowires, can solve the problems of toxicity, reducing agent is easy to form silver oxide heterogeneous structure, and high reduction temperature

Inactive Publication Date: 2003-06-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the following disadvantages: (1) the obtained silver nanowires are not single crystal; (2) the use of PVP as a structure-directing agent has certain toxicity; (3) the reduction of PtCl 2 Obtained seed crystals due to PtCl 2 The price is high (more than 1,000 yuan per gram), so the synthesis cost is high; (4) The reduction temperature is relatively high (160°C), and when the reducing agent is insufficient, it is easy to form a silver oxide heterogeneous structure

Method used

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  • Synthesis for mono-crystal silver nano wire
  • Synthesis for mono-crystal silver nano wire
  • Synthesis for mono-crystal silver nano wire

Examples

Experimental program
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Effect test

example 1

[0009] Take 2ml of butyl titanate and acetylacetone at a volume ratio of 1:1 and mix them evenly, then transfer them into a three-hole distillation flask; 3 Mix 1ml of the aqueous solution with 10ml N'N dimethylformamide (DMF), ultrasonically disperse, make it evenly mixed, and then add it dropwise to the distillation flask, while constantly stirring the mixed solution. When AgNO 3 After the mixed liquid with DMF is added dropwise, the temperature starts to rise, and after the temperature rises to 50° C., the reaction is carried out at a constant temperature for 2 hours; after the reaction mixture is cooled, it is centrifuged at an appropriate speed to obtain silver nanowires. Through the experiment of Example 1, it is found that when the reaction temperature is lower and the time is shorter, the number of silver nanowires obtained is relatively small, and the length is also relatively short. Example two

[0010] Mix 6ml of butyl titanate and acetylacetone at a volume ratio ...

example 3

[0011] Mix 3ml of butyl titanate and acetylacetone at a volume ratio of 2:1 and transfer them into a three-hole distillation flask; 3 Mix 1ml of the aqueous solution with 10ml N'N dimethylformamide (DMF), ultrasonically disperse, make it evenly mixed, and then add it dropwise to the distillation flask, while constantly stirring the mixed solution. When AgNO 3 After the mixed liquid with DMF is added dropwise, the temperature starts to rise. After the temperature rises to 60°C, it is reacted at a constant temperature for 8 hours; after the reaction mixture is cooled, it is centrifuged at an appropriate speed to remove the silver nanoparticles contained in the supernatant to obtain silver nanowires. . Example four

example 4

[0012] Mix 6ml of butyl titanate and acetylacetone at a volume ratio of 5:1 and transfer them to a three-hole distillation flask; 3 Mix 1ml of the aqueous solution with 10ml N'N dimethylformamide (DMF), ultrasonically disperse, make it evenly mixed, and then add it dropwise to the distillation flask, while constantly stirring the mixed solution. When AgNO 3 After the mixed liquid with DMF is added dropwise, the temperature starts to rise, and after the temperature rises to 70° C., the reaction is carried out at a constant temperature for 24 hours; after the reaction mixture is cooled, it is centrifuged at an appropriate speed to obtain silver nanowires.

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Abstract

A process for synthesizing the monocrystal silver nanowire includes such steps as proportionally mixing butyl titanate with acetylacetone, loading in distilling bottle, adding the mixture of the aqueous solution of AgNO3 and N'N dimethyl formamid (DMF), stirring while reaction at 50-70 deg.C for 2-24 hr, and centrifugal separating. Its advantages are low cost, high structural performance and high output rate.

Description

technical field [0001] The invention relates to nanowires, in particular to a method for synthesizing single crystal silver nanowires. Background technique [0002] Since the discovery of carbon nanotubes, one-dimensional nanostructured materials, such as nanowires, nanorods and nanotubes of noble metals Au, Ag and some other oxides and nitrides, have been used in molecular circuits due to their unique optical properties and quantum transport effects. Therefore, exploring and preparing low-dimensional nanomaterials with ordered structures and excellent properties has always been a research hotspot. With the integration and quantization of optoelectronic components, silver nanowires have attracted more and more attention. The main reason is that among all metals, silver exhibits very good electrical and thermal conductivity. The preparation of Ag nanowires mainly includes template method (such as carbon nanotube [JeremySloan, et al, Chem.Commun., 1999,699,700], silicon dioxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16C30B29/62
Inventor 赵启涛侯立松黄瑞安
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI