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A surface-enhanced Raman scattering substrate material, its preparation method and application

A technology of substrate materials and detection methods, applied in Raman scattering, material excitation analysis, metal material coating technology, etc., can solve problems such as the inability to detect aldehyde gas molecules

Inactive Publication Date: 2020-08-21
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the molecules to be measured need to be adsorbed in the hot spots of the plasma, and it is difficult to adsorb the gas with strong fluidity, so the detection of aldehyde gas molecules cannot be realized.

Method used

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  • A surface-enhanced Raman scattering substrate material, its preparation method and application
  • A surface-enhanced Raman scattering substrate material, its preparation method and application
  • A surface-enhanced Raman scattering substrate material, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1) Synthesis of silver nanowires

[0050] Add 0.3g of polyvinylpyrrolidone to 20mL of ethylene glycol, then heat the mixture to 180°C, and quickly add 0.025g / mL of silver chloride in ethylene glycol mixture 1mL under vigorous stirring, and continue heating to 180°C . And 2 mL of 0.05 g / mL silver nitrate-ethylene glycol mixture was added dropwise under vigorous stirring. After stirring at 180 °C for 1 hour, the off-white product was collected by centrifugation at 5000 rpm for 5 minutes and washed three times with ethanol.

[0051] 2) Synthesis of core-shell structure of silver nanowires and cobalt-nickel double hydroxide with hollow structure

[0052] The silver nanowires produced in step 1) were dispersed in 20 mL of methanol by sonication, and 0.1 g of 2-methylimidazole was added to the mixture to continue sonication for 0.5 h. Add 0.1 g of cobalt nitrate to the mixture, and sonicate for 1 hour. The purple ash product was collected by centrifugation at 5000 rpm for...

Embodiment 2

[0062] 1) Synthesis of silver nanowires

[0063] 0.5 g of polyvinylpyrrolidone was added to 50 mL of ethylene glycol. Then, the mixture was heated to 180°C, and 2 mL of 0.025 g / mL silver chloride in ethylene glycol mixture was rapidly added under vigorous stirring, and the addition was continued to 180°C. And 2 mL of 0.05 g / mL silver nitrate-ethylene glycol mixture was added dropwise under vigorous stirring. After stirring at 180 °C for 0.5-1 h, the off-white product was collected by centrifugation at 2000 rpm for 8 min and washed three times with ethanol.

[0064] 2) Synthesis of core-shell structure of silver nanowires and cobalt-nickel double hydroxide with hollow structure

[0065]The silver nanowires prepared in step 1) were dispersed in 20 mL of methanol by sonication, and 0.2 g of 2-methylimidazole was added to the mixture to continue sonication for 1 h. Then add 0.2 g of cobalt nitrate to the mixture, and sonicate for 3 h. The purple ash product was collected by ce...

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Abstract

The invention discloses a surface enhancement Raman scattering substrate material, and a preparation method and application thereof. The material is composed of silver nanowires and core-shell structures (Ag@Co-Ni LDH) of hollowed structure cobalt-nickel bimetallic hydroxides (Co-Ni LDH), the surface of the substrate material is modified by 4-aminothiophenol, the capturing of aldehyde molecules can be achieved, and the qualitative and quantitative detection on the aldehyde molecules is achieved. Enhanced RGB imaging is conducted on Raman peak intensity at the position of 1623 cm <-1>, the color range is 0-300, three digits of numerical values of R, G and B at an RGB imaging image are read respectively, and bar code or two-dimensional code coding is conducted by using 9 digits of numbers ofRGB and to-be-detected molecular concentration information.

Description

technical field [0001] The invention relates to a base material, in particular to a surface-enhanced Raman scattering base material, its preparation method and application. Background technique [0002] The changes in cell metabolism of cancerous cells lead to a large difference in the types and contents of volatile organic gases (VOCs) in the exhaled matter of lung cancer patients and ordinary people. Aldehyde molecules are an important class of molecules in VOCs. They can be used as respiratory markers to judge the metabolism of tissue cells according to their content, and then realize the early diagnosis of cancer. At present, VOCs detection and analysis are mainly carried out by solid-phase microextraction combined with gas chromatography-mass spectrometry (GC-MS) technology, thermal desorber combined with gas chromatography, etc. Such methods require cumbersome pretreatment and require high equipment. [0003] Surface-enhanced Raman scattering (SERS) is an analytical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65B22F1/02B22F9/24B82Y30/00B82Y40/00C23C18/12
Inventor 王铁乔学志
Owner INST OF CHEM CHINESE ACAD OF SCI
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