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Substrate for surface enhanced Raman scattering and preparation method thereof

A technology that enhances Raman scattering and substrates, applied in the field of chemical analysis and detection, to achieve the effects of improved sensitivity, easy concentration, and small contact area

Inactive Publication Date: 2011-08-17
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The inventor considers that the combination of superhydrophobic concentration and the existing enhanced Raman scattering technology can improve the signal enhancement effect of Raman scattering, but there is no report on the combination of the two technologies

Method used

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  • Substrate for surface enhanced Raman scattering and preparation method thereof
  • Substrate for surface enhanced Raman scattering and preparation method thereof
  • Substrate for surface enhanced Raman scattering and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0061] The present invention also provides a method for preparing a substrate for surface-enhanced Raman scattering, comprising:

[0062] a) sintering the solid support with zinc acetate on the surface at 300-350°C to obtain the first slide;

[0063] b) soaking the first slide in a mixed solution of zinc nitrate, hexamethylenetetramine and 1,3-propanediol to form a zinc oxide nanolayer on the surface of the first slide to obtain a second slide ;

[0064] c) soaking the second slide in the noble metal solution, taking it out and irradiating it with ultraviolet light to obtain a third slide;

[0065] d) immersing the third slide in a noble metal plating solution to form a noble metal nanolayer on the surface of the zinc nanolayer; the noble metal is gold or silver;

[0066] e) soaking the fourth slide in a hydrophobic compound solution to form a hydrophobic layer on the surface of the noble metal nanoparticle layer of the fourth slide to obtain a substrate.

[0067] Compared ...

Embodiment 1

[0075] Preparation of superhydrophobic surface-enhanced Raman scattering substrate

[0076] Take a glass slide with a size of 1 cm×1.5 cm, and ultrasonically clean it in acetone, ethanol, and ultrapure water for 10 minutes in order to obtain a clean glass slide, and dry it with nitrogen. Wet the slide with 12 μL, 0.005M ethanol solution of zinc acetate, rinse with ethanol after 25 seconds, N 2 Blow dry and repeat this operation 4 times. The glass slide was placed in a muffle furnace and sintered at 350° C. for 20 min to obtain a glass slide coated with ZnO seeds. Put the glass slide covered with ZnO into 20mL containing 0.025MZn(NO 3 ) 2 , 0.025M HMT, and 0.19M DAP solution, reacted at 92°C for 90min, and prepared a glass slide coated with ZnO nanorod array. Put the glass slide coated with ZnO nanorod array into 3mL 0.05M AgNO 3 Soak in the solution for 30 minutes, and then turn on the ultraviolet lamp for 10 minutes. The wavelength of the ultraviolet lamp is 254nm, the p...

Embodiment 2

[0082] Take 1×10 -6 5 μL of 4-ATP (p-mercaptoaniline) aqueous solution of M was dropped on the substrate prepared in Example 1, and dried at room temperature. After the solvent evaporated, the substrate was placed in a Renishaw 2000 microscope. The Raman scattering spectrum data is collected in the laser Raman spectrometer, and the results are as follows figure 1 Shown in curve b.

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Abstract

The invention provides a substrate for surface enhanced Raman scattering. The substrate comprises a solid support, a zinc oxide nano rod layer, a noble metal nano particle layer and a hydrophobic layer, wherein the zinc oxide nano rod layer is formed on the surface of the solid support; the noble metal nano particle layer is formed on the zinc nano particle layer and covers the zinc nano particlelayer; the hydrophobic layer is formed on the surface of the noble metal nano particle layer; and the noble metal is gold or silver. Compared with the prior art, the substrate provided by the invention has good signal enhancing effect and high detection sensitivity, reduces the detection limit, and has good reproducibility. The invention also provides a preparation method for the substrate.

Description

technical field [0001] The invention relates to the field of chemical analysis and detection, in particular to a substrate for surface-enhanced Raman scattering and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering is a highly sensitive analytical technique. It means that when molecules are adsorbed on the surface of solids such as gold and silver, especially rough solids (i.e. substrates), the Raman scattering intensity of molecules will be extremely large (10 3 -10 6 times) enhanced phenomenon. To achieve this enhancement, it is necessary to have an efficient enhancement substrate. So far, the preparation of reinforced substrates has been mainly achieved through three approaches: coarsening of gold-silver electrodes, induced aggregation of nanoparticles, and assembly of nanoparticles. Early substrates were dominated by roughened electrodes. Roughening a smooth gold or silver electrode by electrochemical or other methods can ...

Claims

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Application Information

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IPC IPC(8): G01N21/65C23C28/00
CPCG01N21/658
Inventor 李壮许富刚张悦孙玉静石岩温志伟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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