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Preparation method of plasma-etched electro-spinning fibrous membrane SERS (surface-enhanced Raman scattering substrate)

A technology of electrospun fiber and plasma, which is applied in ultrasonic/acoustic fiber processing, textiles and papermaking, instruments, etc., can solve problems such as the influence of SERS performance, achieve improved SERS enhancement effect, good signal repeatability, and simple preparation method Effect

Active Publication Date: 2017-08-04
ZHONGBEI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, since these metal nanoparticles are mostly distributed in the interior of the fiber, their SERS performance is often easily affected

Method used

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  • Preparation method of plasma-etched electro-spinning fibrous membrane SERS (surface-enhanced Raman scattering substrate)
  • Preparation method of plasma-etched electro-spinning fibrous membrane SERS (surface-enhanced Raman scattering substrate)
  • Preparation method of plasma-etched electro-spinning fibrous membrane SERS (surface-enhanced Raman scattering substrate)

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Embodiment approach

[0016] As a specific embodiment of the present invention, in the preparation method of the present invention, the composite nanofiber membrane is placed in a plasma etching machine to achieve etching treatment; wherein, the process parameters of the etching treatment are: gas flow rate during the etching process The etching power is 10cc / min, the pressure is 100mTorr, the etching power is 25W-100W, and the etching time is 1-8min.

[0017] Of course, in order to better combine the polymer with the precursor of metallic silver nanoparticles, the polymer may be dissolved in a solvent in advance, and then the precursor may be dissolved in the mixed solution before electrospinning. Some embodiments of the present invention are provided below. In these embodiments, the precursor of metallic silver nanoparticles is AgNO 3 , The polymer is polyacrylonitrile (PAN). And the preparation method of composite nanofiber membrane is:

[0018] (1) PAN / AgNO 3 Solution configuration: AgNO 3 ...

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Abstract

The invention belongs to the technical field of Raman detection and particularly relates to a preparation method of plasma-etched electro-spinning fibrous membrane SERS (surface-enhanced Raman scattering substrate). The substrate is prepared by processing a composite nano-fibrous membrane by virtue of gas plasma. According to the preparation method, metal silver nanoparticles in the composite fibrous membrane are reduced in situ in a gas plasma treatment process so as to form the polymer / metal silver nanoparticle composite fibrous membrane SERS; by controlling plasma etching conditions and the precursor content of metal silver nanoparticles, the SERS enhancement effect of the fibrous membrane SERS to probe molecules is adjusted and controlled. The preparation method is simple and short in cycle, and the prepared SERS has good enhancement effect and signal repeatability and is of great importance in theoretical research and practical application of the Raman detection.

Description

technical field [0001] The invention belongs to the technical field of Raman detection, and in particular relates to a method for preparing a SERS substrate of a plasma-etched electrospun fiber membrane. Background technique [0002] As a powerful spectroscopic technique for chemical and biological analysis, surface-enhanced Raman scattering (SERS) has broad application prospects in analytical chemistry, biomedicine and environmental detection. Due to the surface plasmon resonance effect, noble metal nanoparticles such as gold and silver are often used as SERS substrate materials. It is worth noting that gold and silver nanoparticles are relatively easy to agglomerate, and the performance of the SERS substrate formed by them is relatively unstable. Therefore, these nanoparticles need to be loaded on a specific substrate. Electrospun fibrous membranes are ideal substrates for loading noble metal nanoparticles due to their large specific surface area and easy availability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/02D04H1/728G01N21/65
CPCD04H1/728D06M10/02G01N21/658
Inventor 刘志承贾露李洋张涛刘亚青白露颜照东
Owner ZHONGBEI UNIV