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Hydrophobic paper surface-enhanced Raman substrate and application thereof

A surface-enhanced Raman and hydrophobic technology, applied in the field of analysis and detection, can solve the problems of cumbersome process, high cost, and long time consumption, and achieve the effects of good repeatability, good stability, and simplified reaction process

Inactive Publication Date: 2019-08-30
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above methods introduce hydrophobic molecular chains into the SERS substrate to achieve the purpose of improving the hydrophobic performance, these methods for hydrophobic modification of the SERS substrate are cumbersome, time-consuming and expensive, and the hydrophobic molecular structure is difficult to match with paper. SERS substrates form effective chemical bonds, and the hydrophobic stability of SERS substrates needs to be further improved, and it is not suitable for SERS substrates

Method used

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  • Hydrophobic paper surface-enhanced Raman substrate and application thereof
  • Hydrophobic paper surface-enhanced Raman substrate and application thereof
  • Hydrophobic paper surface-enhanced Raman substrate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1, Preparation of Hydrophobic Paper Surface Enhanced Raman Substrate

[0065] (1) Preparation of paper SERS substrate

[0066] Cut the filter paper into small pieces of 2cm×2cm, put it in 100mL Tris-HCl buffer solution with pH=8.5, then add DA to the above buffer solution, control the concentration of DA to 2mg·mL –1 , Stir the reaction at room temperature for 24h, and then take out the DA-modified filter paper, wash it with distilled water and ethanol several times, and then use it for later use. AgNO 3 Add to 100mL secondary water to control AgNO 3 The concentration is 2mg·mL –1 , add the prepared DA-modified filter paper to the above solution, stir at room temperature for 24h, utilize the reducibility of the phenolic hydroxyl group in the PDA molecule to remove Ag + In situ reduction, AgNPs were grown on the surface of the paper substrate, washed with distilled water, and the product was dried in vacuum before use.

[0067] (2) Synthesis of long-chain al...

Embodiment 2

[0079] As described in Example 1, the difference is: the concentration of DA in the solution in step (1) is 4mg·mL –1 , AgNO 3 The concentration is 4mg·mL –1 .

Embodiment 3

[0081] As described in Example 1, the difference is: the concentration of DA in the solution in step (1) is 8mg·mL –1 , AgNO 3 The concentration is 8mg·mL –1 .

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Abstract

The invention relates to a hydrophobic paper surface-enhanced Raman substrate and an application thereof. The substrate comprises a paper substrate on which metal nanometer particles are covered; andN,N-long chain alkyl diazomethane hydrophobic layer connected with the paper substrate and / or metal nanometer particles through a chemical bond. The invention further discloses the application of thehydrophobic paper surface-enhanced Raman substrate in the analysis detection field. The hydrophobic SERS disclosed by the invention has good stability, the stability is strong since the hydrophobic function group is modified to the surface of the paper substrate through a chemical bonding way. After placing for 6 months, the R6G is used as a probe signal molecule to perform stability testing, andthe Raman enhancement signal strength change is less than 6%.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a hydrophobic paper surface enhanced Raman substrate and an application thereof. Background technique [0002] Surface-enhanced Raman scattering (SERS) obtains a signal that is stronger than ordinary Raman scattering by adsorbing molecules on the surface of rough metal or metal sol particles. It is an analytical testing technique that does not require labeling of the detection substance and has high sensitivity. , high accuracy and non-destructive testing and other outstanding advantages, it has shown great application potential in the fields of biomedicine, chemical materials and food testing. Due to the characteristics of paper substrates such as easy sample sampling, portability, biodegradability, environmental friendliness, and low cost, more and more researchers have constructed various noble metal nanoparticles on the surface of paper substrates a...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 张志良杨鹏飞刘俊张灵子
Owner QILU UNIV OF TECH
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