SERS substrate and preparation method and application thereof

A substrate and substrate technology, applied in the field of laser applications, can solve problems such as difficult to control orderly directional growth of wrinkles, without considering stress distribution, etc., and achieve excellent enhancement performance and high detection sensitivity

Pending Publication Date: 2021-05-07
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed preparation method does not consider the influence of stress distribution during the preparation process, so the disclosed Raman scattering substrate forms disordered labyrinth-like folds, and it is difficult to control the more ordered and directional growth of the folds.

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  • SERS substrate and preparation method and application thereof
  • SERS substrate and preparation method and application thereof
  • SERS substrate and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0057] This embodiment provides a SERS substrate, which includes a second metal film (gold, with a thickness of 30 nm), a first metal film (gold, with a thickness of 5 nm), and a polymer film (PS, with a thickness of 36nm), its microstructure is as Figure 4 , Figure 5 shown by Figure 4-Figure 5 It can be seen that the wrinkles of the resulting SERS substrate are uniformly distributed in nanoscale size.

[0058] This embodiment also provides the preparation method of described SERS substrate, and described preparation method comprises the following steps:

[0059] (1) Ultrasonic cleaning of the glass sheet with acetone, absolute ethanol and deionized water in sequence, drying in an oven after drying with nitrogen, dissolving the polymer (PS) in the solvent, and ultrasonic vibration to obtain the polymer solution;

[0060] (2) Spin-coat the polymer solution on a glass sheet at a speed of 8000r / min, and heat it at 80°C to obtain a polymer film;

[0061] (3) Depositing the...

Embodiment 2

[0064] This embodiment provides a SERS substrate, which includes a second metal film (silver, with a thickness of 20 nm), a first metal film (silver, with a thickness of 3 nm), and a polymer film (PDMS, with a thickness of 20 nm) stacked in sequence. 30nm).

[0065] This embodiment also provides the preparation method of described SERS substrate, and described preparation method comprises the following steps:

[0066] (1) Ultrasonic cleaning of the glass sheet with acetone, absolute ethanol and deionized water in sequence, blowing dry with nitrogen and drying in an oven, dissolving the polymer (PDMS) in the solvent, and ultrasonically vibrating to obtain the polymer solution;

[0067] (2) Spin-coat the polymer solution on a glass sheet at a speed of 6000r / min, and heat it at 100°C to obtain a polymer film;

[0068] (3) Depositing the first metal (silver) film on the polymer film by ion sputtering to obtain the metal / polymer bilayer film;

[0069] (4) The emission device wit...

Embodiment 3

[0071] This embodiment provides a SERS substrate, which includes a second metal film (silver, with a thickness of 50 nm) and a first metal film (aluminum and copper with a mass ratio of 1:1, with a thickness of 7 nm) stacked in sequence. and a polymer film (PMMA and PS at a mass ratio of 1:1, with a thickness of 40 nm).

[0072] This embodiment also provides the preparation method of described SERS substrate, and described preparation method comprises the following steps:

[0073] (1) Ultrasonic cleaning of the glass sheet with acetone, absolute ethanol and deionized water in sequence, drying in an oven after blowing with nitrogen, dissolving the polymers (PMMA and PS) in the solvent, ultrasonic vibration, and obtaining polymer solution;

[0074] (2) Spin-coat the polymer solution on a glass sheet at a speed of 10000r / min, and heat it at 60°C to obtain a polymer film;

[0075] (3) Depositing the first metal (aluminum and copper) film on the polymer film by ion sputtering to ...

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Abstract

The invention relates to an SERS substrate as well as a preparation method and application thereof, and the preparation method comprises the following steps: scanning the surface of a first metal film in a first metal film/polymer film double-layer film by using laser, carrying out heating induction, and depositing a second metal film on the surface of the first metal film to obtain the SERS substrate. The preparation method of the SERS substrate is simple, effective and low in cost, and the obtained SERS substrate is high in wrinkle structure stability and can meet the application requirement of a wrinkle type flexible film.

Description

technical field [0001] The invention relates to the technical field of laser applications, in particular to a SERS substrate and its preparation method and application. Background technique [0002] Raman spectroscopy can obtain fingerprints that reflect the composition and structure information of substances, and can perform qualitative and quantitative analysis of substances. Surface-enhanced Raman spectroscopy (SERS) technology can greatly enhance the Raman signal of the detected substance, and realize real-time, rapid, non-destructive and trace detection. It has been widely used in biosensing and environmental analysis. The performance of SERS depends on the shape, size and gap of the nanostructure of the substrate, and the research on the wrinkled structure has great potential for promoting the preparation and application of new large-area, low-cost SERS substrates. The growth of wrinkled SERS substrates is mainly accomplished by external force stretching, swelling, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 刘言军张建明殷震张一帆
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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