Method for preparing gold-silver alloy nanoparticles in polyelectrolyte multilayer film

A technology of polyelectrolyte and gold-silver alloy, applied in the field of preparing gold-silver alloy nanoparticles, achieving high application value and easy operation

Active Publication Date: 2010-04-21
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The method used in the present invention to prepare gold-silver alloy nanoparticles in polyelectrolyte multilayer film has not been reported yet

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  • Method for preparing gold-silver alloy nanoparticles in polyelectrolyte multilayer film

Examples

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Embodiment 1

[0014] 1) After immersing the glass sheet in a mixed solution of 98% sulfuric acid with a mass percentage of 7:3 and 30% hydrogen peroxide at a volume ratio of 7:3 for 30 minutes, rinse the glass sheet with pure water;

[0015] 2) Soak the glass sheet treated in step 1) in an aqueous solution of branched polyethyleneimine with a pH of 7.0 and a concentration of 5 mg / ml for 10 minutes, and rinse with pure water;

[0016] 3) Then, soak the glass sheet in step 2) in a polyacrylic acid solution with a pH of 3.5 and a concentration of 5 mg / ml for 10 minutes, and then rinse it with pure water;

[0017] 4) repeating step 2) and step 3) to obtain a polyelectrolyte multilayer film whose double-layer number of polyelectrolyte is 7;

[0018] 5) the polyelectrolyte multilayer membrane with the number of double layers that step 4) obtains is 2.0 at pH, and the aqueous solution of the chloroauric acid of 5mM is soaked for 15 minutes, rinses clean with pure water; Soak in the silver aqueous...

Embodiment 2

[0020] 1) After immersing the glass sheet in a mixed solution of 98% sulfuric acid with a mass percentage of 7:3 and 30% hydrogen peroxide at a volume ratio of 7:3 for 30 minutes, rinse the glass sheet with pure water;

[0021] 2) Soak the glass sheet treated in step 1) in an aqueous solution of branched polyethyleneimine with a pH of 9.0 and a concentration of 5 mg / ml for 10 minutes, and rinse with pure water;

[0022] 3) Then soak the glass sheet in a polyacrylic acid solution with a pH of 3.0 and a concentration of 5 mg / ml for 10 minutes, and then rinse it with pure water;

[0023] 4) repeating step 2) and step 3) to obtain a polyelectrolyte multilayer film whose double-layer number of polyelectrolyte is 7;

[0024] 5) the polyelectrolyte multilayer membrane that the double-layer number that step 4) is obtained is 2.5 at pH, and the aqueous solution of chloroauric acid that concentration is 5mM soaks 15 minutes, rinses clean with pure water; Then concentration is 10mM nitri...

Embodiment 3

[0026] 1) After immersing the glass sheet in a mixed solution of 98% sulfuric acid with a mass percentage of 7:3 and 30% hydrogen peroxide at a volume ratio of 7:3 for 30 minutes, rinse the glass sheet with pure water;

[0027] 2) Soak the glass sheet treated in step 1) in an aqueous solution of branched polyethyleneimine with a pH of 5.0 and a concentration of 5 mg / ml for 10 minutes, and rinse with pure water;

[0028] 3) Soak the glass sheet in a polyacrylic acid solution with a pH of 7.0 and a concentration of 5 mg / ml for 10 minutes, and then rinse it with pure water;

[0029] 4) repeat step 2) and step 3) to obtain the polyelectrolyte multilayer film that the double layer number of polyelectrolyte is 5;

[0030] 5) the polyelectrolyte multilayer membrane that the double-layer number that step 4) is obtained is 3.0 at pH, and the aqueous solution that concentration is the chloroauric acid of 5mM soaks 15 minutes, rinses clean with pure water; Then concentration is 10mM nitr...

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Abstract

The invention relates to a method for preparing gold-silver alloy nanoparticles in a polyelectrolyte multilayer film, which comprises the following steps of: preparing a multilayer film which contains a branched polyethyleneimine or a linear polyethyleneimine and a polyacrylic acid or a polymethylacrylic acid through self-assembly of connecting one layer by one layer; sequentially soaking the multilayer film in aqueous solutions of a chloroauric acid and a silver nitrate; heating the multilayer film absorbed with gold and silver ions in an oven for reduction; and obtaining the gold-silver alloy nanoparticles. The obtained gold-silver alloy nanoparticles have characteristic surface plasmas which resonate to absorb signals, and have very high application value in the fields of catalyst, photics and the like.

Description

technical field [0001] The invention relates to a method for preparing gold-silver alloy nanoparticles in a polyelectrolyte multilayer film. Background technique [0002] Due to the physical and chemical properties of two metal components, bimetallic nanomaterials have potential applications in many fields, such as catalysis, optical detection, immunoassay, information storage, etc. Gold and silver nanoparticles have important basic research and practical application value due to their unique optical and electronic properties, for example, they can be used as substrate materials for tunable surface-enhanced Raman scattering effects, or as surface plasmon resonance sensors etc. Gold-silver bimetallic nanomaterials include gold-silver core-shell structure and gold-silver alloy structure, and there are relatively few studies on gold-silver alloy nanoparticles. At present, the synthesis of gold-silver alloy nanoparticles is mainly focused on the development of various methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16B22F9/24
Inventor 董绍俊尚利金丽花
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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