Method for covering silver nanoparticle aggregate on solid substrate material

A silver nanoparticle, solid substrate technology, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of surface modifier difficult to wash off, cumbersome operation, limited wide application, etc., to achieve excellent stability The effect of high performance, simple production process and simple operation process

Active Publication Date: 2014-05-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The base material of this method is only copper powder, and the operation is cumbersome. The base material and the solution need to be separated and the base material needs to be dried. At the same time, the surface modifier used in this material is difficult to wash off, which limits the use of this material in the detection of surface-enhanced Raman spectroscopy. wide application of

Method used

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  • Method for covering silver nanoparticle aggregate on solid substrate material
  • Method for covering silver nanoparticle aggregate on solid substrate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for covering silver nanoparticle aggregates on a solid base material, the steps are as follows:

[0032] 1) Weigh 0.2 mmol of silver nitrate and 0.05 gram of polyvinylpyrrolidone and dissolve them in 20 milliliters of water;

[0033] 2) Weigh 0.40 mmol of stannous chloride, dissolve it in 20 milliliters of ethanol, add 0.1 mmol of hydrochloric acid;

[0034] 3) Soak the copper foil in the mixed solution prepared in step 2), let it stand for reaction for 1 minute, take it out and dry it in the air; then soak it in the mixed solution prepared in step 1), let it stand for reaction for 1 minute, take it out in Dry in the air; Repeat the above steps 3 times to obtain a solid base material whose surface is covered with silver nanoparticle aggregates;

[0035] 4) Soak the solid base material covered with silver nanoparticle aggregates obtained in step 3) in the mixed solution prepared in step 2) for 1 min, and then wash with pure water for 3 times.

Embodiment 2

[0036] Embodiment 2: A method for covering silver nanoparticle aggregates on a solid base material, the steps are the same as in Embodiment 1, except that step 3) is repeated 4 times.

Embodiment 3

[0037] Embodiment 3: A method for covering silver nanoparticle aggregates on a solid base material, the steps are the same as in Embodiment 1, except that step 3) is repeated 5 times.

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Abstract

The invention provides a method for covering a silver nanoparticle aggregate on a solid substrate material and belongs to the field of preparation of an inorganic nano material. In the method, a replacement reaction between a single substance and a silver ion is utilized, and stannous chloride is used as an adjusting agent to cover the silver nanoparticle aggregate on the solid substrate material. The method disclosed by the invention is reasonable in design, simple to operate, good in repeatability and is easy to produce on large scale, and reaction is easy to control. The silver nanoparticles covering the solid substrate material is uniform in size and large in distribution density; and the silver nanoparticle aggregate has high electrical conductivity and oxidization resistance, and can be used for the fields of surface-enhanced Raman spectroscopy, electronic industries and the like.

Description

technical field [0001] The invention relates to a method for covering silver nano particle aggregates on a solid base material, and belongs to the technical field of inorganic nano material preparation. Background technique [0002] Silver has stable properties and is not easily oxidized. Silver nanomaterials are also the metal with the best surface-enhanced Raman scattering effect. Among them, silver nanoparticle aggregates in solution have been widely used in Raman detection due to their high Raman enhancement effect and simple preparation. However, silver nanoparticle aggregates in solution are unstable and easy to precipitate, resulting in poor reproducibility of Raman signals, which greatly limits the application range of nanoparticle aggregates in solution. Solid substrate materials have high stability and are widely used in the field of Raman detection. [0003] The solid substrate material covered by silver nanoparticle aggregates has high Raman enhancement effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/42
Inventor 占金华姜小红姜玮
Owner SHANDONG UNIV
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