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Preparation method for silver nanoflower with surface Raman enhancement effect

A technology of surface Raman enhancement and silver nanometers, applied in the field of material chemistry, can solve the problems of unfavorable expansion of production, high requirements for equipment and expensive production costs, etc., and achieve the effects of stable structure and morphology control, low cost and easy operation

Pending Publication Date: 2018-03-27
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage is that it requires high equipment and high production cost, which is not conducive to expanding production.

Method used

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  • Preparation method for silver nanoflower with surface Raman enhancement effect
  • Preparation method for silver nanoflower with surface Raman enhancement effect
  • Preparation method for silver nanoflower with surface Raman enhancement effect

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] First, prepare 10 mL of 0.2 mmol / L FeCl 3 Ethylene glycol solution, weigh 0.174 g of PVP and dissolve it in FeCl 3 Ethylene glycol solution, stirred until clear and ready to use. Then, measure 10 ml of ethylene glycol solution and weigh 0.017g of AgNO 3 Dissolve in ethylene glycol solution, stir well to dissolve and transfer to constant pressure dropping funnel. Under the condition of magnetic stirring, the AgNO 3 Ethylene glycol solution is quickly added dropwise to the PVP solution (containing a certain concentration of FeCl 3 ), the dropping time was controlled at about 2min. After the dropwise addition, the solution was flocculent silvery white, indicating that AgCl colloid was formed in the solution. The...

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Abstract

The invention discloses a preparation method for a silver nanoflower with a surface enhanced Raman effect. The method comprises the steps that 1, 10mL of an FeCl3ethylene glycol solution with concentration being 0.2 mmol / L is prepared; 2, 0.174g of PVP is taken and dissolved in the FeCl3ethylene glycol solution obtained from step1 to obtain a solution A; 3, 0.017g of AgNO3 is taken and dissolvedinto 10mL of ethylene glycol to obtain a solution B, and the solution B is transferred into a constant-pressure dropping funnel; 4, the solution B is added into the solution A to obtain a solution C;5, the solution C is transferred into a hydrothermal reaction kettle, and reacting is carried out for 2.5h in a drying oven; 6, the reaction kettle is naturally cooled to the room temperature to obtain a solution D; 7, acetone is added into the solution D, centrifuging is carried out for 10 minutes at the speed of 10000r / min, and a precipitate is washed by using deionized water, centrifuging is repeated for five times by using the same condition, and the precipitate is dispersed in the deionized water to obtain a silver nanoflower solution; and 8, 3mL of the silver nanoflower solution is takenand dropped on a silicon wafer, and drying is carried out to obtain the to-be-detected silver nanoflower with the surface enhanced Raman effect. The method has the advantages that the preparation method is simple, and the Raman enhancement effect is remarkable.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and relates to a preparation method of silver nanoflowers with surface Raman enhancement effect. Background technique [0002] Compared with other materials, metal nanoparticles have many unique physical and chemical properties, among which the surface plasmon resonance properties of metal nanoparticles attract the most attention. Based on the surface plasmon resonance effect, metal nanoparticles have been widely used in biotransmission sense and surface Raman enhancement. Among them, surface-enhanced Raman scattering (SERS), as a material analysis technique, can achieve ultra-sensitive detection in the fields of analysis, environment and catalysis. Alkali metals, noble metals and some transition metals have good surface Raman enhancement activity, among which silver nanoparticles have the best enhancement effect, followed by gold and copper. The commercial application of SERS is limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/054
Inventor 陈华才戚海艳赵淑慧
Owner CHINA JILIANG UNIV
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