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Preparation method for flaky silver nanometer materials

A technology of nanomaterials and flake silver, which is applied in the direction of nanotechnology, can solve the problems of restricting the application of silver nanomaterials and strong biological toxicity, and achieve the effects of strong versatility, good biocompatibility and good biocompatibility

Active Publication Date: 2015-12-16
XIAMEN UNIV
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Problems solved by technology

These ligands can well regulate the shape of silver nanomaterials, but they are highly toxic, which limits the application of silver nanomaterials in bioanalysis and biomedicine.

Method used

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  • Preparation method for flaky silver nanometer materials
  • Preparation method for flaky silver nanometer materials
  • Preparation method for flaky silver nanometer materials

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Embodiment 1

[0033] The technical route of this embodiment is as figure 1 As shown, the process of exploring the specific experimental conditions is as follows Figure 4 to Figure 7 As shown, the specific steps are as follows:

[0034] (1) The synthesis of silver seeds was carried out by sodium borohydride reduction (eg figure 1), add 0.7mL of water, 25μL of 10mM silver nitrate, and 25μL of 10mM sodium citrate into a 1.5mL centrifuge tube, mix well, add 300μL of 1mM sodium borohydride aqueous solution prepared with ice water, shake vigorously for 20s, and place at room temperature for 2 hours to wait for the decomposition of sodium borohydride Finally, silver seed solution was obtained. Synthesized silver seeds such as figure 2 shown.

[0035] (2) The synthesis of flake silver nanomaterials is carried out by seed growth. The synthesis process is to add 4 μL of 10 mM hydroquinone, 4 μL of 100 mM pH3.5 sodium citrate buffer, 2 μL of the synthesized silver seed solution, 2 μL of 250 μM ...

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Abstract

The invention discloses a preparation method for flaky silver nanometer materials. The method includes the following steps that firstly, at the existence of sodium citrate, a sodium borohydride solution prepared through ice water is used for reducing silver nitrate so that a silver seed solution is formed; secondly, a p-dihydroxybenzene solution, a sodium citrate buffer solution, the silver seed solution, a DNA solution, water and a silver nitrate solution are measured and taken according to the volume ratio of 3-5:3-5:1-3:1-3:27-30:9-12; and thirdly, after the p-dihydroxybenzene solution, the sodium citrate buffer solution, the silver seed solution, the DNA solution and the water are fully mixed, the silver nitrate solution is added, the mixture is kept away from light and grows for 12-14 h at the temperature of 20-24 DEG C, and then the flaky silver nanometer materials can be obtained. Compared with a traditional method, the preparation method is good in biocompatibility and high in universality, and a new platform is provided for application of the flaky silver nanometer materials in biological analysis and biomedicine.

Description

technical field [0001] The invention belongs to the technical field of silver nanomaterials, and in particular relates to a preparation method of flake silver nanomaterials. Background technique [0002] The shape of silver nanomaterials plays a decisive role in its physical and chemical properties, including surface plasmon resonance effect and surface enhanced Raman scattering effect. (El-Sayed,M.A.SomeInterestingPropertiesofMetalsConfinedinTimeandNanometerSpaceofDifferentShapes[J].Acc.Chem.Res.2001,34,257-264;Nie,S.;Emory,S.R.ProbingSingleMoleculesandSingleNanoparticlesbySurface-EnhancedRamanScattering[J].Science1997,275,1102-1106)不同形状银纳米 Materials can be synthesized by anisotropic growth of seeds, thus enabling controllable tuning of optical and electrical properties. Due to these excellent properties, silver nanomaterials are widely used in bioanalysis and biomedicine. Currently, it has been possible to synthesize silver nanoparticles in various shapes, such as spheric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 杨朝勇李久兴祝冰青马艳丽严锦懋阮庆宇林冰倩周雷激朱志
Owner XIAMEN UNIV
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