A method to improve the enhanced Raman scattering performance of nanoporous metal surface

A technology that enhances Raman scattering and nanoporosity, and is applied in Raman scattering, metal material coating technology, sputtering plating, etc., to achieve the effect of wide application, wide application range and controllable radiation dose

Active Publication Date: 2020-07-10
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A method to improve the enhanced Raman scattering performance of nanoporous metal surface
  • A method to improve the enhanced Raman scattering performance of nanoporous metal surface
  • A method to improve the enhanced Raman scattering performance of nanoporous metal surface

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) with Cu 30 Zr 65 Al 5 Three-dimensional bicontinuous nanoporous copper, Cu 30 Zr 65 Al 5 X-ray diffraction experiments confirmed the characteristics of the amorphous structure of thin strip samples (such as figure 1 shown);

[0027] (2) Load the prepared nanoporous copper into the tandem static accelerator, and vacuum it to 1×10 -3 ~2×10 - 4 Pa;

[0028] (3) The energy is 9MeV, the dose is 9.36×10 13 ions / cm 2 Irradiation of gold ions, the irradiation temperature is room temperature, and the irradiation time is 1 hour;

[0029] (4) After irradiation, the surface of nanoporous copper becomes rough, the ligaments are coarsened, and the pores become smaller, thus providing more active sites, and the alloying effect is produced due to the implantation of gold ions after irradiation (such as figure 2 shown);

[0030] (5) With R6G as the probe molecule, prepare 10 -4 The probe molecular solution with mol / L concentration was used as the substrate before and ...

Embodiment 2

[0032] (1) with Cu 30 Zr 65 Al 5 Three-dimensional bicontinuous nanoporous copper, Cu 30 Zr 65 Al 5 X-ray diffraction experiments confirmed the characteristics of the amorphous structure of thin strip samples (such as figure 1 shown);

[0033] (2) Load the prepared nanoporous copper into the tandem static accelerator, and vacuum it to 1×10 -3 ~2×10 - 4 Pa;

[0034] (3) The energy is 3MeV, the dose is 3.36×10 14 ions / cm 2 Copper ion irradiation, the irradiation temperature is room temperature, and the irradiation time is 1 hour;

[0035](4) After irradiation, the surface of nanoporous copper becomes rough, the ligaments are coarsened, and the pores become smaller, thus providing more active sites;

[0036] (5) With R6G as the probe molecule, prepare 10 -4 The probe molecular solution with mol / L concentration was used as the substrate with nanoporous copper before and after copper ion irradiation, and its performance was tested, and the SERS performance was improved...

Embodiment 3

[0039] (1) with Cu 50 Zr 45 Al 55 Amorphous alloy thin strips are used as precursors, and three-dimensional bicontinuous nanoporous metals are prepared by chemical dealloying;

[0040] (2) Load the prepared nanoporous copper into the tandem static accelerator, and vacuum it to 1×10 -3 ~2×10 - 4 Pa;

[0041] (3) The energy is 9MeV, the dose is 9.36×10 13 ions / cm 2 Irradiation of gold ions, the irradiation temperature is room temperature, and the irradiation time is 1 hour;

[0042] (4) After the irradiation, the surface of nanoporous copper becomes rough, the ligaments are coarsened, and the pores become smaller, thus providing more active sites, and the alloying effect is produced due to the implantation of gold ions after irradiation;

[0043] (5) With R6G as the probe molecule, prepare 10 -4 mol / L concentration of the probe molecule solution, using nanoporous copper before and after gold ion irradiation as the substrate, to detect its performance, the SERS performan...

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Abstract

The invention relates to a method for improving the surface enhanced Raman scattering property of nano-porous metal and belongs to the field of nano materials. The method comprises the steps that firstly, an amorphous alloy thin strip serves as a precursor, and through a chemical dealloying method, the three-dimensional bicontinuous nano-porous metal is prepared; and then the nano-porous metal issubjected to ion irradiation of appropriate dose by adopting a high-energy metal ion irradiation source. The surface of the irradiated nano-porous metal is roughed, a ligament becomes thick, holes become small, thus more activity sites can be provided, and enhancement factors of surface enhanced Raman scattering of the nano-porous metal can be increased by 2-10 times. The method is expected to have good application prospects in the fields such as chemical engineering, environments, biological medicines and sensors.

Description

Technical field: [0001] The present invention relates to a method for improving the Raman scattering performance of nanoporous metal surface by using ion irradiation. Specifically, firstly, a three-dimensional bicontinuous nanoporous material is prepared by chemical dealloying using amorphous alloy thin strips as a precursor. Metal: The nanoporous metal is irradiated with a suitable dose of ion by using a high-energy metal ion irradiation source. After irradiation, the surface of the nanoporous metal becomes rough, the ligaments are coarsened, and the pores become smaller, so that more active sites can be provided, and the enhancement factor of the surface-enhanced Raman scattering of the nanoporous metal can be increased by 2 to 10 times. Background technique: [0002] Surface-enhanced Raman scattering (SERS) is an abnormal surface optical phenomenon discovered by applying laser Raman spectroscopy to surface science research. It can amplify the Raman signal of molecules ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/48C23C14/02G01N21/65
CPCC23C14/021C23C14/48G01N21/658
Inventor 刘雄军王晶李睿胡召一王辉吴渊付恩刚吕昭平
Owner UNIV OF SCI & TECH BEIJING
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