Surface-enhanced Raman scattering substrate based on metal nanobowl and preparation method thereof

A technology of surface-enhanced Raman and metal nanotechnology, applied in Raman scattering, measuring devices, instruments, etc., can solve the problems of inability to prepare large areas, limit wide application, and high cost, and achieve high surface-enhanced Raman scattering effects, Good repeatability and low cost effect

Active Publication Date: 2020-07-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some nanofabrication methods such as nanoimprinting and electron or ion beam lithography have successfully prepared SERS substrates with good properties, especially three-dimensional micro-nanostructures, these methods are expensive, time-consuming and cannot be fabricated in large areas. These shortcomings limit the wide application of these methods
In addition, the enhancement effect of the existing surface-enhanced Raman scattering substrate needs to be further improved

Method used

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  • Surface-enhanced Raman scattering substrate based on metal nanobowl and preparation method thereof
  • Surface-enhanced Raman scattering substrate based on metal nanobowl and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method based on the metal nanobowl surface-enhanced Raman scattering substrate, the steps are as follows:

[0026] (1) prepare polymer nanobowl;

[0027] First, the polystyrene and polymethyl methacrylate mixed film with a mass ratio of polystyrene and polymethyl methacrylate of 1:9 is soaked in a mixed solvent for 100 min, and the mixed solvent is 2:1:5 by volume. Butanone, acetone and water were used to prepare polymer nanospheres, then soak the polymer nanospheres in cyclohexane for 20 minutes, remove polystyrene to obtain polymer nanobowls, and finally take them out and dry them with compressed air;

[0028] (2) Take the polymer nanobowl as the substrate, and vertically sputter the metal film on it;

[0029] The process parameters of vertical sputtering are: current 20A, time 4s;

[0030] The metal film is nano silver film.

[0031] The final surface-enhanced Raman scattering substrate based on the metal nanobowl is composed of a polymer nanobowl ...

Embodiment 2

[0044] The preparation method based on the metal nanobowl surface-enhanced Raman scattering substrate, the steps are as follows:

[0045] (1) preparing a polymer nanobowl;

[0046] First, the polystyrene and polymethyl methacrylate mixed film with a mass ratio of polystyrene and polymethyl methacrylate of 9:1 is soaked in a mixed solvent for 5 minutes, and the mixed solvent is 2:1:8 by volume. Butanone, acetone and water were used to prepare polymer nanospheres, then soak the polymer nanospheres in cyclohexane for 12 minutes, remove polystyrene to obtain polymer nanobowls, and finally take them out and dry them with compressed air;

[0047] (2) Take the polymer nanobowl as the substrate, and vertically sputter the metal film on it;

[0048] The process parameters of vertical sputtering are: current 15A, time 3s;

[0049] The metal film is nano gold film.

[0050] The final surface-enhanced Raman scattering substrate based on metal nanobowls is as follows: figure 1 As shown...

Embodiment 3

[0053] The preparation method based on the metal nanobowl surface-enhanced Raman scattering substrate, the steps are as follows:

[0054] (1) preparing a polymer nanobowl;

[0055] First, the polystyrene and polymethyl methacrylate mixed film whose mass ratio of polystyrene and polymethyl methacrylate is 1:2 is soaked in the mixed solvent for 50min, and the mixed solvent is 2:1:6 by volume. Butanone, acetone and water were used to prepare polymer nanospheres, then soak the polymer nanospheres in cyclohexane for 18 minutes, remove polystyrene to obtain polymer nanobowls, and finally take them out and dry them with compressed air;

[0056] (2) Take the polymer nanobowl as the substrate, and vertically sputter the metal film on it;

[0057] The process parameters of vertical sputtering are: current 22A, time 6s;

[0058] The metal film is nano gold film.

[0059] The final surface-enhanced Raman scattering substrate based on the metal nanobowl is composed of a polymer nanobowl...

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Abstract

The invention relates to a surface-enhanced Raman scattering substrate based on a metal nanobowl and a preparation method thereof. The surface-enhanced Raman scattering substrate based on the metal nanobowl is composed of a polymer nanobowl and metal films, and the metal films cover the inner surface and the outer surface of the polymer nanobowl; the enhancement factor of the surface-enhanced Raman scattering substrate based on the metal nanobowl is 107 to 109; the enhancement factor is the ratio of Raman signal intensity of dye solutions with the same concentration on the enhanced substrate and a non-enhanced substrate; the enhanced substrate is a surface-enhanced Raman scattering substrate based on the metal nanobowl, and the difference between the non-enhanced substrate and the enhancedsubstrate is that the non-enhanced substrate does not have a metal film. The preparation method comprises the steps of taking the polymer nanobowl as a substrate, and vertically sputtering a metal film on the substrate to prepare the surface-enhanced Raman scattering substrate based on the metal nanobowl. The preparation method disclosed by the invention is simple, and the prepared surface-enhanced Raman scattering substrate based on the metal nanobowl is remarkable in enhancement effect.

Description

technical field [0001] The invention relates to the technical field of nano surface and its preparation, in particular to a surface-enhanced Raman scattering substrate based on a metal nano bowl and a preparation method thereof. Background technique [0002] Raman enhanced technology is widely used in analytical chemistry, sensing science, molecular bioscience, food science and environmental science, involving important fields such as industry, environment, medical treatment and national defense. Since the first discovery that the electrochemically rough micro-nano structured Ag electrode can significantly enhance the spectral line intensity of the pyridine molecular Raman spectrum, this phenomenon has aroused widespread interest in the scientific community, and this phenomenon is named surface-enhanced Raman Scattering, referred to as SERS. Surface-enhanced Raman scattering is mainly due to the fact that the roughening of the metal surface is conducive to the excitation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 徐林
Owner DONGHUA UNIV
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