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A kind of silver-titanium solid solution surface enhanced Raman substrate and preparation method thereof

A surface-enhanced Raman and silver-titanium technology, applied in Raman scattering, nanotechnology for materials and surface science, material excitation analysis, etc., can solve the problem of poor chemical stability hindering the application of silver nanostructure substrates, easy to be corroded, Increased production costs and other issues, to achieve the effect of maintaining stable surface-enhanced Raman performance, maintaining stable Raman performance, and improving stability

Active Publication Date: 2020-04-10
广西三环高科拉曼芯片技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because silver nanostructure substrates are prone to oxidation and vulcanization when stored in air, and are easily corroded in solution, their poor chemical stability hinders the application of surface-enhanced Raman effect on silver nanostructure substrates.
[0003] In order to improve its shortcomings, the traditional method is usually to prepare the core-shell structure of silver and oxide by chemical methods, atomic layer deposition, composite graphene and other processes, and wrap a layer of extremely thin inert material on the prepared silver nano-substrate. , Silver nanorods and graphene composite, but this has the disadvantages of complicated process, easy introduction of impurities, and increased production cost

Method used

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  • A kind of silver-titanium solid solution surface enhanced Raman substrate and preparation method thereof
  • A kind of silver-titanium solid solution surface enhanced Raman substrate and preparation method thereof
  • A kind of silver-titanium solid solution surface enhanced Raman substrate and preparation method thereof

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preparation example Construction

[0026] The equipment used in the present invention to prepare silver-titanium solid-solution nanorod surface-enhanced Raman substrate is as follows: Figure 6 As shown, the device mainly includes a first evaporation source 1, a second evaporation source 2, a baffle 3, a first crystal oscillator 4, a second crystal oscillator 5, and a sample stage 6; the specific preparation method is as follows:

[0027] A method for preparing a silver-titanium solid-solution nanorod surface-enhanced Raman substrate, the method specifically comprising the following steps:

[0028] 1) The substrate is ultrasonically cleaned and dried one by one with acetone, absolute ethanol, and deionized water; the substrate preferably adopts a silicon wafer, a quartz wafer or optical glass;

[0029] 2) Fix the pre-treated substrate on the sample stage of the double electron beam evaporation coating machine, wherein the center distance between the two evaporation sources is controlled at 3-6cm;

[0030] 3) U...

Embodiment 1

[0034] 1) The silicon substrate polished on one side is ultrasonically cleaned one by one with acetone, absolute ethanol and deionized water and dried;

[0035] 2) Fix the pretreated substrate on the sample stage of the double electron beam evaporation coating machine;

[0036] 3) At room temperature, using metal silver and metal titanium as the target material, the distance between the two crucibles is 4cm, and the chamber of the double electron beam evaporation coating machine is evacuated to a vacuum degree of 9×10 －5 Pa;

[0037] 4) Adjust the incident angle of the double electron beam to 85 degrees, and make the sample stage static, and control the silver plating rate Control the plating rate of titanium On the substrate of the sample stage, co-deposit a silver-titanium solid-solution nano-slant rod film with a length of about 400nm;

[0038] 5) Prepare 10 -6 mol / L methylene blue solution;

[0039] 6) Put the surface-enhanced Raman substrate prepared in steps 1) to...

Embodiment 2

[0044] 1) The silicon substrate polished on one side is ultrasonically cleaned one by one with acetone, absolute ethanol and deionized water and dried;

[0045] 2) Fix the pretreated substrate on the sample stage of the double electron beam evaporation coating machine;

[0046] 3) At room temperature, using metal silver and metal titanium as the target material, the distance between the two crucibles is 4cm, and the chamber of the double electron beam evaporation coating machine is evacuated to a vacuum degree of 7×10 －5 Pa;

[0047] 4) Adjust the incident angle of the double electron beam to 86 degrees, control the rotation speed of the substrate table to be 5 revolutions per minute, and control the silver plating rate Control the plating rate of titanium On the substrate of the sample stage, a silver-titanium solid-solution nano-slant rod film with a length of about 500nm is co-deposited;

[0048] 5) Prepare 0.02mol / L NaCl aqueous solution;

[0049] 6) Put the surface-...

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Abstract

The invention relates to a silver titanium solid solution surface-enhanced Raman substrate and a preparation method thereof. The surface-enhanced Raman substrate is composed of a nano rod array, and silver and titanium in the nano rod array form a silver-titanium solid solution structure. The method employs an inclination growth method for preparing a silver-titanium solid solution nano rod arrayfilm under a double-electron beam evaporation coating film system, the prepared silver-titanium solid solution nano rod array film can realize continuous change of titanium and silver atomic ratios ina scope of 0.01-99; condition that oxygen potential of titanium is lower than that of silver is used, titanium is oxidized in air, so that silver is protected, and stability of the substrate in air is increased; condition that chemical potential of titanium is lower than that of silver is used, silver in a solution is taken as a cathode and is protected so that silver failure is prevented, and the stability of the substrate in the solution is increased. The titanium solid solution surface-enhanced Raman substrate can obviously increase the stability of the substrate in the air and the solution.

Description

technical field [0001] The invention belongs to the technical field of trace organic matter detection, in particular to a surface-enhanced Raman substrate with a silver-titanium solid-solution nanorod array structure and a preparation method thereof. Background technique [0002] As a trace substance detection method, the surface-enhanced Raman effect is widely used in the fields of environmental pollutant detection, food safety detection, biology and medical treatment due to its high sensitivity, rapid detection, low cost, and non-destructive analysis. Usually, noble metal materials such as gold, silver or copper are used to prepare high-sensitivity surface-enhanced Raman substrates, and the surface-enhanced Raman effect of silver nanostructure substrates is the best. Since silver nanostructure substrates are prone to oxidation and vulcanization when stored in air, and are easily corroded in solution, their poor chemical stability hinders the application of surface-enhanced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65B82Y30/00
CPCB82Y30/00G01N21/658
Inventor 张政军刘跃华
Owner 广西三环高科拉曼芯片技术有限公司
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