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Surface enhanced raman scattering substrate and preparation method thereof

A surface-enhanced Raman and substrate technology, applied in the field of spectral detection, can solve the problems of high processing cost, poor controllability and poor assembly controllability, and achieve the effect of reducing the area, reducing the difficulty of the process, and broad application prospects

Inactive Publication Date: 2018-12-07
NAT UNIV OF DEFENSE TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The invention provides a surface-enhanced Raman scattering substrate and a preparation method thereof, which are used to overcome defects in the prior art such as high processing cost, poor controllability of substrate hot spot formation, and poor assembly controllability, and reduce surface-enhanced Raman Scatter the processing cost of the substrate, and improve the controllability of the substrate hot spot formation and the controllability of the assembly process

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  • Surface enhanced raman scattering substrate and preparation method thereof
  • Surface enhanced raman scattering substrate and preparation method thereof
  • Surface enhanced raman scattering substrate and preparation method thereof

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Embodiment 1

[0041] Please refer to Figure 7 , Figure 8 , the invention provides a method for preparing a surface-enhanced Raman scattering substrate, comprising the following steps:

[0042] Step S1, preparing metal magnetic beads. The specific structure of the metal magnetic beads is a magnetic sphere inner core and a noble metal shell covering its outer surface; in a specific embodiment of the present invention, a chemical synthesis method is used to prepare magnetic ferromanganese Oxygen microspheres are used as the inner core of the magnetic sphere, and then a noble metal shell is coated on the outer core of the magnetic sphere to form a metal magnetic bead; the noble metal here refers to gold, silver, and copper.

[0043] Step S2, preparing a number of confinement pits distributed in an array in the preparation area on one side of the substrate body, the bottom surface of the confinement pits is planar; in a specific embodiment of the present invention, the substrate body is made ...

Embodiment 2

[0121] Please refer to Figure 9 , Figure 10 , the embodiment of the present invention also provides a surface-enhanced Raman scattering substrate, which decomposes a large-area SERS substrate into a plurality of small areas at designated positions, ensuring that the distribution of SERS hot spots in each small area is the same; it includes a substrate body 1 and A number of metal magnetic beads 2;

[0122] The base body 1 is in the shape of a sheet, one side of which is provided with a preparation area P;

[0123] The bottoms of several confinement pits 50 are flat bottoms (bottoms are flat), and all are located in the preparation area P, and several confinement pits 50 are distributed in an array; the depth of each confinement pit 50 along the confinement pit 50 is The direction is formed with at least one metal bead layer 60, see Figure 11 , each layer of metal magnetic beads 60 includes a plurality of metal magnetic beads 2 uniformly and closely arranged in the confin...

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Abstract

The invention discloses a surface enhanced raman scattering substrate and a preparation method thereof. The preparation method comprises the following steps: preparing metal magnetic balls, each of which comprises a magnetic ball core and a noble metal shell layer coated on the outer surface of the magnetic ball core; preparing a plurality of limited range pits distributed in array on a preparation zone of a substrate main body; adding a magnetic field to the exterior of the substrate main body, repeatedly vibrating the magnetic field, thereby driving the metal magnetic balls on the surface ofthe substrate main body with the limited range pits to enter into the limited range pits and forming at least one metal magnetic ball layer along the depth direction of the limited range pits, wherein each metal magnetic ball layer is composed of a plurality of metal magnetic balls uniformly and closely arrayed in the limited range pits, and the metal magnetic balls of each metal magnetic ball layer are arrayed in a crystal-oriented form and in a hexagonal structure. The scheme is capable of solving the problems of high cost, complex process or low controllability of the prior art, reducing the processing cost of the surface enhanced raman scattering substrate and increasing the controllability of substrate hotspot forming and the controllability of an assembling process.

Description

technical field [0001] The invention relates to the technical field of spectrum detection, in particular to a surface-enhanced Raman scattering substrate and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (hereinafter referred to as SERS) technology is an emerging spectral detection technology, which has great potential application prospects in the field of high-sensitivity on-site real-time biochemical detection. [0003] According to the morphological characteristics and preparation methods of the substrates, the existing SERS substrates can be divided into three categories. The first category is metal nanostructure substrates fabricated by micronano processing, the second category is metal nanoparticle sol substrates, and the third category is metal nanoparticle assembly. base. [0004] The commonly used processing methods for the first type of metal nanostructure substrates include focused ion beam etching, electron beam li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 王朝光吴学忠董培涛陈剑王京李白泥
Owner NAT UNIV OF DEFENSE TECH
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