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Super hydrophobic type SERS (Surface-enhanced Raman scattering) composite substrate

A composite substrate and super-hydrophobic technology, which is applied in the field of molecular spectrum analysis and detection, can solve problems affecting the stability and accuracy of detection, low sensitivity of trace substances, and no concentration effect, etc., to improve sensitivity and accuracy, improve Determinism and stability, the effect of eliminating edge effects

Inactive Publication Date: 2014-05-28
胡建明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the SERS substrate of the above prior art, after the solution is added dropwise, the droplet will spread quickly, and in this process, an obvious edge effect will be produced, that is, the solute in the solution will gather at the edge after diffusion, causing the edge part of the solute to The concentration is higher than the middle part, which affects the stability and accuracy of detection
At the same time, the above-mentioned substrates have no concentrating effect and are less sensitive to trace substances

Method used

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  • Super hydrophobic type SERS (Surface-enhanced Raman scattering) composite substrate
  • Super hydrophobic type SERS (Surface-enhanced Raman scattering) composite substrate

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Embodiment Construction

[0017] figure 1 It is a schematic diagram of the structure of the present invention, figure 2 for figure 1 Along the A-A sectional view; as shown in the figure: the superhydrophobic SERS composite substrate of the present embodiment includes a base layer 1 and a SERS base layer 2 with a superhydrophobic surface 11, and the SERS base layer 2 is embedded or placed on the base layer 1 super Hydrophobic structure surface 11, the size of the SERS base layer 2 is smaller than the droplet size formed by a drop of solution on the superhydrophobic surface; that is, the SERS base layer is a sheet structure, and its maximum size cannot be greater than the horizontal size of a drop of solution dropped on the superhydrophobic surface , the solution forms an ellipsoid or spherical shape after being dropped into super-transported water, which fully covers the SERS base layer. After concentration, a concentrated solution with a uniform substance is formed on the surface of the SERS base lay...

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Abstract

The invention discloses a super hydrophobic type SERS (Surface-enhanced Raman scattering) composite substrate. The composite substrate comprises a base layer with a super hydrophobic surface and an SERS substrate layer, wherein the SERS substrate layer is embedded or placed on a super hydrophobic structure surface of the substrate layer, and smaller than a solution droplet formed on the super hydrophobic surface; after the solution of detected substances drips on the SERS substrate layer, spheroidal and ellipsoidal droplets are formed on the super hydrophobic surface and can be used for fully covering the SERS substrate layer, the super hydrophobic surface and tiny SERS eliminate edge effects of the prior art, and the distribution uniformity of a detected solute on the SERS substrate layer is ensured, so that the certainty and stability of detection results are improved; the spheroidal droplets with larger specific surface areas are formed by a detected solution on the super hydrophobic surface, and the concentration of the detected solute can be increased after the spheroidal droplets are concentrated, and the detection sensitivity and accuracy can be improved, therefore, in comparison with a common SERS substrate, the substrate has better enhancement effects and ultra-high sensitivity for analysis, and is applied to detection of ultra-trace samples.

Description

technical field [0001] The invention relates to the field of molecular spectrum analysis and detection, in particular to a substrate for surface-enhanced Raman scattering and a preparation method thereof. Background technique [0002] When light is irradiated on the material, elastic scattering and inelastic scattering occur. The scattered light of elastic scattering has the same wavelength as the excitation light, and the scattered light of inelastic scattering has components longer and shorter than the wavelength of excitation light, which is called Raman Scattering, the obtained spectrum is called Raman spectrum. Raman spectroscopy belongs to molecular vibration spectroscopy, which is the fingerprint of material molecules. Raman spectrometers made according to the Raman effect can be used to accurately and qualitatively identify samples. The analysis method of Raman spectroscopy generally does not require pretreatment of samples, and is easy to operate during the analysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 胡建明施金乐丁帅军杨盼范美坤崔玉廷
Owner 胡建明
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