Superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment and preparation method thereof

An ultra-fine nano, base material technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as inability to obtain enrichment, achieve strong chemical enhancement effect, less chemical reagents, Effects of Strong Raman Signals

Active Publication Date: 2021-01-01
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing nanoporous silver materials all have (111) plane crystal forms, none of them can obtain (111) plane orientation enrichment.

Method used

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  • Superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment and preparation method thereof
  • Superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment and preparation method thereof
  • Superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1: Weigh Ag and Zn pure metal particles according to the composition ratio of 19.6:80.4, and after mixing, melt into Ag through a high-frequency induction melting furnace under the protection of inert gas 19.6 Zn 80.4 Alloy ingot, the Ag obtained by smelting 19.6 Zn 80.4 The alloy ingot is smelted repeatedly 3-4 times to ensure the uniformity of the internal composition of the ingot.

[0041] Ag was prepared by the single-roll stripping process 19.6 Zn 80.4 alloy strip,

[0042] Put the broken alloy ingot into the quartz tube (diameter ), put it vertically into the induction melting coil of the single-roller stripping device, and reheat the alloy to a molten state through high-frequency induction;

[0043] Introduce high-pressure argon gas into the quartz tube, so that the melt is quickly sprayed to the copper roller with a rotation speed of 1500rpm under the action of pressure, and the melt is rapidly solidified into an alloy thin strip by the chilling effect o...

Embodiment 2

[0046]S1: Weigh Ag and Zn pure metal particles according to the ratio of 23.6:76.4. After mixing, they are smelted into Ag by high-frequency induction melting furnace under the protection of inert gas. 23.6 Zn 76.4 Alloy ingot, the Ag obtained by smelting 23.6 Zn 76.4 The alloy ingot is smelted repeatedly 3-4 times to ensure the uniformity of the internal composition of the ingot.

[0047] Ag was prepared by the single-roll stripping process 23.6 Zn 76.4 Alloy strips, put broken alloy ingots into a quartz tube with a lower opening (diameter ), put it vertically into the induction melting coil of the single-roller stripping device, and reheat the alloy to a molten state through high-frequency induction;

[0048] Introduce high-pressure argon gas into the quartz tube, so that the melt is quickly sprayed to the copper roller with a rotation speed of 1500rpm under the action of pressure, and the melt is rapidly solidified into an alloy thin strip by the chilling effect of th...

Embodiment 3

[0051] S1: Weigh Ag and Zn pure metal particles according to the ratio of composition ratio of 23:77, and after mixing, they are smelted into Ag by high-frequency induction melting furnace under the protection of inert gas 23 Zn 77 Alloy ingot, the Ag obtained by smelting 23 Zn 77 The alloy ingot is smelted repeatedly 3-4 times to ensure the uniformity of the internal composition of the ingot.

[0052] Ag was prepared by the single-roll stripping process 23 Zn 77 Alloy strips, put broken alloy ingots into a quartz tube with a lower opening (diameter ), put it vertically into the induction melting coil of the single-roller stripping device, and reheat the alloy to a molten state through high-frequency induction;

[0053] Introduce high-pressure argon gas into the quartz tube, so that the melt is quickly sprayed to the copper roller with a rotation speed of 1500rpm under the action of pressure, and the melt is rapidly solidified into an alloy thin strip by the chilling eff...

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Abstract

The invention discloses a superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment. The superfine nano-porous silver SERS substrate material is characterized inthat pore channels and a metal ligament of the superfine nano-porous silver material are mutually connected to form a three-dimensional continuous nano-porous structure, the metal ligament has ordered lattice stripes, the lattice spacing of the lattice stripes on the metal ligament is 0.237 nanometer, diffraction peaks, corresponding to an epsilon-AgZn3 phase, of the superfine nano-porous silvermaterial disappear completely, diffraction peaks, corresponding to (111) and (222) crystal faces of fcc-Ag, exist at 38.1 degrees and 81.6 degrees, and the superfine nano-porous silver material has (111) surface orientation enrichment. The invention further discloses a preparation method of the superfine nano-porous silver SERS substrate material based on (111) plane orientation enrichment. The ultrafine nano-porous silver material has (111) plane orientation enrichment and stronger molecular adsorption capacity, so that the ultrafine nano-porous silver material has a stronger chemical enhancement effect on SERS.

Description

technical field [0001] The invention relates to the technical field of nanometer metal functional materials, in particular to an ultrafine nanoporous silver SERS base material based on (111) plane orientation enrichment and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (SERS) has the ability to ultrasensitively and rapidly detect trace amounts of probe molecules. It is generally believed that the Raman enhancement mainly comes from the enhanced local electromagnetic field in close proximity to the noble metals (Ag and Au), while the chemical enhancement is also another important factor, which mainly depends on the size, shape and exposed surface of the metal nanostructure. [0003] The individual faces in the crystal are directly related to their physical and chemical properties, which lead to different SERS enhancements. At present, nanoporous silver materials have been used as substrate materials for SERS. Nanosilver single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02C25F3/02G01N21/65B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25C5/02C25F3/02G01N21/658
Inventor 淡振华袁园罗家钰徐子豪周子杰秦凤香
Owner NANJING TECH UNIV
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