Preparation method of silver nanowire with surface Raman enhancement effect

Abstract

The invention discloses a preparation method of a silver nanowire with a surface Raman enhancement effect. The preparation method comprises the following steps: (1) preparing 10 mL of Na2S ethylene glycol solution with the concentration being 0.2 mmol / L; (2) weighing 0.174 g of PVP and dissolving PVP in the Na2S ethylene glycol solution in step (1) to obtain a solution A; (3) weighing 0.017 g of AgNO3 and dissolving AgNO3 in 10 mL of an ethylene glycol solution to obtain a solution B, and transferring the solution B into a constant-pressure dropping funnel; (4) dropwise adding the solution B in the solution A to obtain a solution C; (5) transferring the solution C into a hydrothermal reactor, and reacting the solution C for 2.5 hours in a drying box; (6) taking out the reactor, standing and naturally cooling to the room temperature to obtain a solution D; (7) adding the solution D in acetone, and carrying out centrifugal separation on the solution for 10 minutes at the speed of 10,000r / min; and washing precipitates with deionized water, centrifuging under the same conditions, repeating for 5 times, and finally dispersing the precipitates in deionized water to obtain a silver nanowire solution; and (8) dropwise adding 3 mL of the silver nanowire solution on a silicon wafer, and drying for measurement. The preparation method of the silver nanowire with the surface Raman enhancement effect has the advantages that a detection result is accurate, a preparation method is simple, and a Raman enhancement effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and relates to a method for preparing silver nanowires 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 limited...

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

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