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Gold nanoneedle material and preparation method thereof

A gold nanometer and aqueous solution technology, which is applied in the analysis of materials, material excitation analysis, metal processing equipment, etc., can solve the problems of affecting SERS stability, surface pollution, low yield, etc., and achieve enhanced localized surface plasmon resonance and surface purity , the effect of large output

Active Publication Date: 2021-08-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this product can be used as a SERS active substrate, both the preparation method and its preparation method have shortcomings. First, the silver in the gold-silver alloy of the product is easily oxidized, which affects the stability of its SERS; secondly, the organic reduction on the surface of the product Reagents are easy to interfere with its SERS performance; again, in the process of preparation, not only the parameters of the reaction must be precisely regulated at each step, but the morphology will change if there is a slight deviation, and the yield is also low. At the same time, the organic reducing agent The use of levodopa will inevitably adhere to the surface of the product, causing surface pollution

Method used

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  • Gold nanoneedle material and preparation method thereof
  • Gold nanoneedle material and preparation method thereof
  • Gold nanoneedle material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The concrete steps of preparation are:

[0039] Step 1, prepare 200g / L copper sulfate pentahydrate aqueous solution, 150g / L sodium hydroxide aqueous solution and 150g / L glucose aqueous solution respectively.

[0040] Step 2, according to the volume ratio of copper sulfate pentahydrate aqueous solution, sodium hydroxide aqueous solution and glucose aqueous solution is 0.8: 1.2: 0.8, the sodium hydroxide aqueous solution is added dropwise to the copper sulfate aqueous solution pentahydrate, and vigorously stirred for 3 minutes; Wherein, the stirring rate during vigorous stirring was 800 r / min, and a mixed solution was obtained. After the mixed solution was placed at 45°C and stirred for 7 minutes, an aqueous glucose solution was added thereto under stirring, and after stirring and reacting for 25 minutes, a transition reaction solution was obtained.

[0041] Step 3, after carrying out 2 times of centrifugal cleaning to the transition reaction liquid, the solid matter obt...

Embodiment 2

[0044] The concrete steps of preparation are:

[0045] Step 1, prepare 225g / L copper sulfate pentahydrate aqueous solution, 138g / L sodium hydroxide aqueous solution and 175g / L glucose aqueous solution respectively.

[0046] Step 2, first according to the volume ratio of copper sulfate pentahydrate aqueous solution, sodium hydroxide aqueous solution and glucose aqueous solution is 0.9: 1.1:0.9, after adding sodium hydroxide aqueous solution dropwise into copper sulfate aqueous solution pentahydrate, stir vigorously for 4 minutes; Wherein, the stirring rate during vigorous stirring was 850 r / min, and a mixed solution was obtained. Then the mixed solution was placed at 48° C. and stirred for 6 minutes, then an aqueous glucose solution was added thereto under stirring, and after stirring and reacting for 28 minutes, a transition reaction solution was obtained.

[0047] Step 3, after the transition reaction liquid is carried out 3 times of centrifugal cleaning, the obtained solid ...

Embodiment 3

[0050] The concrete steps of preparation are:

[0051] Step 1, prepare 250g / L copper sulfate pentahydrate aqueous solution, 125g / L sodium hydroxide aqueous solution and 200g / L glucose aqueous solution respectively.

[0052] Step 2, according to the ratio of the volume ratio of copper sulfate pentahydrate aqueous solution, sodium hydroxide aqueous solution and glucose aqueous solution to 1:1:1, the sodium hydroxide aqueous solution is added dropwise to the copper sulfate aqueous solution pentahydrate, and vigorously stirred for 5 minutes; Wherein, the stirring rate during vigorous stirring was 900 r / min, and a mixed solution was obtained. After the mixed solution was placed at 50° C. and stirred for 5 minutes, an aqueous glucose solution was added thereto under stirring, and after stirring and reacting for 30 minutes, a transition reaction solution was obtained.

[0053] Step 3, after the transition reaction liquid was carried out 3 times of centrifugal cleaning, the solid mat...

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Abstract

The invention discloses a gold nano needle bundle material and a preparation method thereof. The needle cluster material is densely covered with arc-shaped gold nanoneedles on the numerous gold petals constituting the gold ball; the method is to prepare the copper sulfate pentahydrate aqueous solution, the sodium hydroxide aqueous solution and the glucose aqueous solution respectively, and then mix the sodium hydroxide The aqueous solution and the glucose aqueous solution are added to the copper sulfate pentahydrate aqueous solution to react to obtain a transition reaction liquid, and then the transition reaction liquid is centrifugally cleaned and dispersed into deionized water to obtain a transition product dispersion liquid, and then sodium sulfide powder is firstly added to it for reaction, The intermediate reaction solution is obtained, and then the intermediate reaction solution is centrifugally cleaned and dispersed into deionized water to obtain an intermediate product dispersion. Finally, chloroauric acid is added to the intermediate product dispersion to react to obtain the target product located in the final reaction solution. . Its SERS performance is stable, the surface is pure, and it is very easy to be widely commercialized and applied to the rapid detection of trace substances.

Description

technical field [0001] The invention relates to a needle cluster material and a preparation method thereof, in particular to a gold nano needle cluster material and a preparation method thereof. Background technique [0002] At present, in the field of surface-enhanced Raman scattering (SERS), noble metal nanomaterials have irreplaceable advantages, especially noble metal nanostructures with a needle-like structure. Due to the antenna effect and localized surface plasmon resonance effect at the needle tip, more The strong local electromagnetic field can effectively enhance the Raman signal, further laying a good foundation for rapid trace detection of substances. To this end, people have made unremitting efforts to obtain noble metal tip nanostructures with high SERS active substrates, such as the title "Highly Sensitive, Uniform, and Reproducible Surface Enhanced Raman Spectroscopy from Hollow Au-Ag Alloy Nanourchins", ADVANCED MATERIALS, 2014, 26 (15): 2431-2439 ("Hollow ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24G01N21/65
CPCB22F9/24G01N21/658B22F1/05B22F1/07
Inventor 张洪文符浩蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI