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Cleaning and reassembling method of surface enhanced Raman spectrum substrate

A surface-enhanced Raman and assembly method technology, applied in Raman scattering, measurement devices, material analysis by optical means, etc., can solve the problems of complex SERS substrate preparation process, irreversible damage to the environment, and high preparation cost, and can overcome the problems of one-time Easy to use, improve surface uniformity, and easy to operate

Pending Publication Date: 2022-04-12
安徽中科赛飞尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, SERS substrates made of group B metals such as Au, Ag, and Cu are commonly used. The preparation process of such SERS substrates is complex, time-consuming, and costly. They are only for one-time use and will cause irreversible damage to the environment.

Method used

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  • Cleaning and reassembling method of surface enhanced Raman spectrum substrate
  • Cleaning and reassembling method of surface enhanced Raman spectrum substrate
  • Cleaning and reassembling method of surface enhanced Raman spectrum substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A clean reassembly method for a surface-enhanced Raman spectroscopy substrate, comprising the steps of:

[0038] S1. Prepare the gold nanorod substrate, add 2 μL of 10 -7 mol / L crystal violet solution, after drying, carry out SERS detection, each substrate is detected 5 times, and record the Raman spectrum;

[0039] Put 3mL of concentrated hydrochloric acid, 1mL of concentrated nitric acid and 5mL of water in a beaker and mix to obtain a desorption solution; place the gold nanorod substrate after the dropwise addition of the crystal violet solution in the desorption solution for 10s, then quickly take out the substrate and put it on the Rinse in ultrapure water at 25°C for 30 seconds, then dry in an oven at 25°C to obtain an intermediate substrate;

[0040] S2, 100mL concentration is the dodecyldimethylphenoxyethyl ammonium bromide aqueous solution of 0.1mol / L, 60mL concentration is the sodium dodecylbenzenesulfonate aqueous solution of 0.1mol / L, 3mL concentration is 0...

Embodiment 2

[0048] A clean reassembly method for a surface-enhanced Raman spectroscopy substrate, comprising the steps of:

[0049] S1. Prepare the gold nanorod substrate, drop 2 μL of 10ng / mg methamphetamine solution, and perform SERS detection. Each substrate is detected 5 times, and the Raman spectrum is recorded;

[0050] Put 3mL of concentrated hydrochloric acid, 1mL of concentrated nitric acid and 5mL of water in a beaker and mix to obtain a desorption solution; place the gold nanorod substrate after the dropwise addition of the crystal violet solution in the desorption solution for 10s, then quickly take out the substrate and put it on the Rinse in ultrapure water at 25°C for 30 seconds, then dry in an oven at 25°C to obtain an intermediate substrate;

[0051] S2. Mix 100 mL of dodecyltrimethylammonium bromide aqueous solution with a concentration of 0.1 mol / L and 3 mL of sodium borohydride aqueous solution with a concentration of 0.1 mol / L, add the intermediate substrate, and stan...

Embodiment 3

[0059] A clean reassembly method for a surface-enhanced Raman spectroscopy substrate, comprising the steps of:

[0060] S1. Prepare the gold nanorod substrate, add 2 μL of 10 -7 mol / L crystal violet solution, after drying, perform SERS detection, each substrate is detected 5 times, and the Raman spectrum is recorded, all 5 times are at 720cm -1 、915cm -1 、937cm -1 、1170cm -1 、1584cm -1 、1617cm -1 The characteristic peaks of crystal violet solution appear, indicating that the detection performance of this substrate is good;

[0061] Put 3mL of concentrated hydrochloric acid, 1mL of concentrated nitric acid and 50mL of water in a beaker and mix to obtain a desorption solution; place the gold nanorod substrate after the dropwise crystal violet solution in the desorption solution for 20s, then quickly take out the substrate and put it on the Rinse in ultrapure water at 40°C for 10 seconds, then dry in an oven at 25°C to obtain an intermediate substrate;

[0062] S2, 100mL c...

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Abstract

The invention discloses a cleaning and reassembling method for a surface-enhanced Raman spectrum substrate. The cleaning and reassembling method comprises the following steps: S1, soaking the used surface-enhanced Raman spectrum substrate in a desorption solution; then taking out the substrate, and rinsing with water to obtain an intermediate substrate; s2, the intermediate substrate is placed in an aqueous solution A for a reaction, then the substrate is taken out and dried, and a solute of the aqueous solution A is one of a mixture of a reducing agent and a quaternization compound and a mixture of the reducing agent, the quaternization compound and a surfactant. According to the method, the used surface-enhanced Raman spectrum substrate can be cleaned and reassembled, so that cyclic utilization is realized, the method is simple and convenient to operate and relatively low in cost, and the defect that the surface-enhanced Raman spectrum substrate loses the detection effect due to dropwise adding of the to-be-detected substance is overcome.

Description

technical field [0001] The invention relates to the technical field of surface-enhanced Raman spectroscopy, in particular to a method for cleaning and reassembling surface-enhanced Raman spectroscopy substrates. Background technique [0002] Surface-enhanced Raman spectroscopy has become an important tool for studying interfaces due to its extremely high surface detection sensitivity and selectivity, and has been widely used in many fields such as electrochemical adsorption, biomedicine, environmental science, material science, and geological science. With the rapid development of nanotechnology in recent years, surface-enhanced Raman scattering effect (SERS) detection has been more widely used in quantitative detection and trace substance analysis. [0003] The prerequisite for surface-enhanced Raman scattering effect is that the substrate must have nanoscale roughness, or particles with a particle size of tens to hundreds of nanometers must be prepared. Therefore, construc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/65
Inventor 杨良保迟敏林东岳
Owner 安徽中科赛飞尔科技有限公司
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