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Method for preparing silver nano sheet self-assembling material

A technology of silver nanosheets and self-assembly is applied in the field of preparation of silver nanosheet self-assembly materials, which can solve the problems of lack of adjustability and limitation of morphology, and achieve controllable structure and morphology, stable particle spacing, and particle size. The effect of narrow diameter distribution

Inactive Publication Date: 2010-08-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional silver nanomaterials, such as nanowires, nanotubes, etc., often lack further adjustability in morphology due to the limitation of existing synthesis conditions, which limits its scope of application in the fields of electronic components, optical devices, etc.

Method used

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  • Method for preparing silver nano sheet self-assembling material
  • Method for preparing silver nano sheet self-assembling material
  • Method for preparing silver nano sheet self-assembling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 72 μl of 0.2M AgNO to a beaker containing 5ml of 0.04M stearic acid in MMA solution 3 Aqueous solution, stirred at room temperature to form reverse micellar solution A. In addition, add 72 μl of 0.2M NaBH to another beaker containing 5ml of 0.04M stearic acid in MMA solution 4 Aqueous solution, stirred at room temperature to form reverse micellar solution B. Then, the reverse micelles B were slowly added to the reverse micelles A solution under magnetic stirring and reacted for 1 h. Centrifuge the resulting reaction solution at a speed of 2500 to 5000 rpm, remove the supernatant, wash with deionized water, centrifuge at a speed of 2500 to 5000 rpm, remove the supernatant, and repeat washing 1 to 3 times, then Washing with ethanol, centrifuging at a rotational speed of 2500-5000 rpm, removing the supernatant, repeating washing 2-3 times, extracting and dispersing the precipitate with ethanol to obtain curly silver nanosheet self-assembly. The molar ratio of water ...

Embodiment 2

[0030] Add 144 μl 0.2M AgNO to a beaker containing 5ml 0.04M stearic acid in MMA solution 3 Aqueous solution, stirred at room temperature to form reverse micellar solution A. In addition, add 144 μl 0.2M NaBH to another beaker containing 5ml 0.04M stearic acid in MMA solution 4 Aqueous solution, stirred at room temperature to form reverse micellar solution B. Then, the reverse micelles B were slowly added to the reverse micelles A solution under magnetic stirring and reacted for 1 h. Centrifuge the resulting reaction solution at a speed of 2500 to 5000 rpm, remove the supernatant, wash with deionized water, centrifuge at a speed of 2500 to 5000 rpm, remove the supernatant, and repeat washing 1 to 3 times, then Washing with ethanol, centrifuging at a rotational speed of 2500-5000 rpm, removing the supernatant, repeating washing 2-3 times, extracting and dispersing the precipitate with ethanol to obtain curly silver nanosheet self-assembly. The molar ratio of water in the raw...

Embodiment 3

[0032] Add 216 μl of 0.2M AgNO to a beaker containing 5ml of 0.04M stearic acid in MMA solution 3 Aqueous solution, stirred at room temperature to form reverse micellar solution A. In addition, add 216 μl 0.2M NaBH to another beaker containing 5ml 0.04M stearic acid in MMA solution 4Aqueous solution, stirred at room temperature to form reverse micellar solution B. Then, the reverse micelles B were slowly added to the reverse micelles A solution under magnetic stirring and reacted for 1 h. Centrifuge the resulting reaction solution at a speed of 2500 to 5000 rpm, remove the supernatant, wash with deionized water, centrifuge at a speed of 2500 to 5000 rpm, remove the supernatant, and repeat washing 1 to 3 times, then Washing with ethanol, centrifuging at a rotational speed of 2500-5000 rpm, removing the supernatant, repeating washing 2-3 times, extracting and dispersing the precipitate with ethanol to obtain curly silver nanosheet self-assembly. The molar ratio of water in th...

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Abstract

The invention discloses a method for preparing a silver nano sheet self-assembling material. The method prepares a silver nano sheet self-assembling body in methyl methacrylate reverse micelle solution of different carboxylic acids by taking AgNO3 and NaBH4 as raw materials. The silver nano sheet can realize different curling degrees by changing the used carboxylic acid, and is self-assembled by fine silver nano granules. The diameter distribution of the silver nano granules is narrow, and is controllable in the different carboxylic acids. The sheet silver nano granule self-assembling body can be used as an effective Raman surface enhancing substrate to improve the detection limit of some special substances in Raman spectrum. The silver has high electric conductivity, and the silver nano material with a two-dimensional structure can form silver nano wires after treatment, so the silver nano material can be used as a high-performance conductive component for preparing a conductive coating. Because of controllability of topography, the silver nano sheet has great application potential and development prospect in the preparation field of electronic devices.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing a silver nanosheet self-assembly material. Background technique [0002] Silver nanomaterials have shown great application potential in many fields, such as high-efficiency catalysts, optical devices, electronic components, and biological detection, and have good development prospects. One-dimensional and two-dimensional silver nanomaterials have attracted widespread attention due to their unique morphology. Traditional silver nanomaterials, such as nanowires and nanotubes, often lack further adjustability in morphology due to the limitation of existing synthesis conditions, which limits its scope of application in the fields of electronic components and optical devices. For silver nano self-assembled body, since it is self-assembled by secondary structures, its shape and configuration are quite adjustable, and it has a good development sp...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 颜光清王立俞豪杰张磊丁文兵王建军马亮赵玉来
Owner ZHEJIANG UNIV
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