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Separated super-hydrophilic/super-hydrophobic surface enhanced Raman scattering substrate and preparation method thereof

A surface-enhanced Raman and Raman-enhanced scattering technology is applied in Raman scattering, material analysis, material excitation analysis, etc., to achieve the effects of reducing the cost of use, improving detection efficiency, and reducing complexity

Pending Publication Date: 2021-09-24
绍兴镭纳激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separated superphilic / superhydrophobic surface-enhanced Raman scattering substrate of the present invention solves the problem of droplet slipping during sample preparation and improves the uniformity of the Raman signal on the substrate surface; the superhydrophilic SERS substrate is divided by the superhydrophobic template It can be divided into different parts, and a variety of different solutions can be dropped at the same time during the test, which greatly improves the detection efficiency and realizes high-throughput detection; the super-hydrophobic template with holes can be reused, reducing the use cost of the substrate

Method used

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  • Separated super-hydrophilic/super-hydrophobic surface enhanced Raman scattering substrate and preparation method thereof
  • Separated super-hydrophilic/super-hydrophobic surface enhanced Raman scattering substrate and preparation method thereof
  • Separated super-hydrophilic/super-hydrophobic surface enhanced Raman scattering substrate and preparation method thereof

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preparation example Construction

[0048] The present invention also provides a method for preparing the separated superphilic / superhydrophobic surface-enhanced Raman scattering substrate, comprising the following steps:

[0049] 1) The transition metal is ablated and irradiated with a laser to obtain a super-hydrophilic surface-enhanced Raman scattering substrate;

[0050] 2) The laser is used to sequentially drill holes and ablate the metal to obtain metals containing micro-nano structures;

[0051] 3) performing oxidation treatment and fluorination treatment on the metal in step 2) sequentially to obtain a superhydrophobic template with holes;

[0052] 4) The superhydrophilic surface-enhanced Raman scattering substrate and the superhydrophobic template with holes are clamped to obtain a separated superphilic / superhydrophobic surface-enhanced Raman scattering substrate.

[0053] In step 1) and step 2) of the present invention, the laser is preferably a femtosecond laser, a picosecond laser or a nanosecond la...

Embodiment 1

[0062] Silver flakes with a length, width and thickness of 10 mm, 25 mm and 0.1 mm were ultrasonically cleaned in alcohol for 3 minutes and then dried with nitrogen gas with a purity of 99.99%. A femtosecond laser is used for ablation irradiation on the surface of the silver sheet. The average power of the laser is 6W, and the path of the dot matrix is ​​scanned, and the scanning time is 0.05ms. After the laser ablation irradiation is completed, the silver sheet is rinsed with absolute ethanol, and then the residual absolute ethanol liquid is blown off with nitrogen gas with a purity of 99.99%. At the same time, it is dried to obtain a super-hydrophilic silver-based substrate with a contact angle of ~0°. The surface-enhanced Raman scattering substrate, the surface of the super-hydrophilic surface-enhanced Raman scattering substrate contains an array of micro-pit arrays, the period of the micro-pit array is 20 μm, and the depth is 5 μm. nanoprotrusions.

[0063] Copper sheets ...

Embodiment 2

[0068] Silver sheets with a length, width and thickness of 10 mm, 25 mm and 0.1 mm were ultrasonically cleaned in alcohol for 5 min, and then dried with nitrogen with a purity of 99.99%. A picosecond laser is used for ablation irradiation on the surface of the silver sheet. The average power of the laser is 35W, and the spot scan time is 10 ms according to the path of the dot matrix. After the laser ablation irradiation is completed, the silver sheet is rinsed with absolute ethanol, and then the residual absolute ethanol liquid is blown off with nitrogen gas with a purity of 99.99%. At the same time, it is dried to obtain a super-hydrophilic silver-based substrate with a contact angle of ~0°. The surface-enhanced Raman scattering substrate, the surface of the super-hydrophilic surface-enhanced Raman scattering substrate contains an array of micro-pit arrays, the period of the micro-pit array is 50 μm, and the depth is 13 μm. nanoprotrusions.

[0069] Copper sheets with a leng...

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Abstract

The invention belongs to the technical field of substance detection, and provides a separated super-hydrophilic / super-hydrophobic surface enhanced Raman scattering (SERS) substrate, which comprises a super-hydrophilic surface enhanced Raman scattering substrate and a super-hydrophobic porous template which are tightly attached; the super-hydrophilic surface enhanced Raman scattering substrate is a lower-layer transition metal substrate, and the super-hydrophobic porous template is an upper-layer metal substrate; and, in the super-hydrophobic perforated template, the diameter of each hole is larger than or equal to 0.1 mm, and the distance between every two holes is larger than or equal to 2 mm. The invention also provides a preparation method of the separated super-hydrophilic / super-hydrophobic surface enhanced Raman scattering substrate. The enhancement factor of the SERS substrate can be increased by 106 times through the evaporation and concentration functions of the super-hydrophobic template containing the small holes, and the limit detection concentration reaches 10-14 mol / L. The super-hydrophobic template can be used for multiple times and can be used on different SERS substrates, so that the preparation and use cost of the super-hydrophilic SERS substrate is reduced.

Description

technical field [0001] The invention relates to the technical field of substance detection, in particular to a separated superphilic / superhydrophobic surface-enhanced Raman scattering substrate and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (SERS) is a technology that detects Raman signals enhanced by substances and analyzes and identifies its components. It has the advantages of simple sample preparation, fast detection speed, high sensitivity, and strong specificity, and is widely used. In food testing, explosives testing, drug testing, environmental monitoring, drug quality testing and other fields. The mechanism of surface-enhanced Raman scattering mainly includes electromagnetic field enhancement mechanism and chemical enhancement mechanism. The key to SERS enhancement is a substrate with a special nanostructure. A good SERS substrate should have high sensitivity, high uniformity, high stability, good practicability an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65C23C22/00B23P15/00
CPCG01N21/658C23C22/00B23P15/00
Inventor 不公告发明人
Owner 绍兴镭纳激光科技有限公司
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