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Method for forming SERS active substrate by assembling gold nanoparticles to electrostatic spinning polymer nanofiber membrane

A nanofiber film and gold nanoparticle technology, applied in Raman scattering, material excitation analysis, etc., can solve the problems of limited practical application, difficulty in large-scale routine detection, complicated steps, etc., and achieve low cost and good reproducibility And the effect of stability and high detection sensitivity

Inactive Publication Date: 2015-03-18
JILIN NORMAL UNIV
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Problems solved by technology

However, these techniques either require complicated steps or are difficult to routinely detect on a large scale, which limits their practical application

Method used

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  • Method for forming SERS active substrate by assembling gold nanoparticles to electrostatic spinning polymer nanofiber membrane
  • Method for forming SERS active substrate by assembling gold nanoparticles to electrostatic spinning polymer nanofiber membrane
  • Method for forming SERS active substrate by assembling gold nanoparticles to electrostatic spinning polymer nanofiber membrane

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Embodiment Construction

[0020] ①. According to the method in the literature (Su, Z.; Li, J.; Li, Q.; Ni, T.; Wei, G. Carbon2012, 50, 5606.) to prepare polycaprolactone nanofiber membrane: first Dissolve polycaprolactone in a 40:60 volume ratio of ethanol-water mixed solution, and then inject this solution into a 10mL plastic syringe equipped with a 20 blunt needle tip, and use 0.1 to 0.3mL in the process of electrospinning h -1 Spray at a high speed. Multilayer biaxially oriented nanofibrous membranes were fabricated by alternating electrospinning at 0° and 90° directions. The first layer of nanofibers was electrospun onto the aluminum foil attached to the collector, after which the aluminum foil was rotated 90°, and the second layer was electrospun on the first layer, and the spraying time of each layer was 10 minutes. Repeat the above procedure until the desired polycaprolactone nanofiber membrane is obtained.

[0021] ②, Hydrophilic modification of the surface of polycaprolactone nanofiber memb...

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Abstract

The invention discloses a method for forming a SERS active substrate by assembling gold nanoparticles to an electrostatic spinning polymer nanofiber membrane and aims at building the active SERS substrate for sensitive detection. The method is based on the gold nanoparticles assembled by the electrostatic spinning polycarpolaction nanofiber membrane; the method comprises the following steps: firstly, inducing the crylic acid to perform grafting modification on the hydrophobic surface of the polycarpolaction nanofiber membrane by adopting the ultraviolet light, and then soaking the polycarpolaction nanofiber membrane in a gold nanoparticle solution for promoting the gold nanoparticles to be assembled to the polycarpolaction nanofiber so as to form the SERS active substrate; a p-aminothiophenol (4-ATP) molecule is adopted as an experiment probe molecule for SERS research, and the research shows that the substrate has the high SERS response sensitivity; the method has great advantages on environment-friendly synthesis, large scale, high stability and good repeatability; the highly active SERS substrate can be used for probing medicine molecules such as 2-thiouracil.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and specifically relates to a method for assembling gold nanoparticles into a SERS active substrate by using electrospinning polymer nanofiber membranes. technical background [0002] Surface-enhanced Raman scattering (SERS) spectroscopy is a very powerful tool for studying molecular / metal nanoparticle systems because of its rich molecular structure information, high sensitivity and surface selectivity. This ultrasensitive analytical method is widely used in the fields of life and environmental sciences, which has stimulated worldwide efforts to explore its theoretical and experimental mechanisms. Various substrates with rough surfaces have been used for SERS research, such as metal sols, electrochemically roughened electrodes, chemically deposited metal films, chemically etched metal nanostructures, and so on. Among these substrates, sol gold and silver nanoparticles ...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 王丽程思宁崔运成姜大雨孙艳涛
Owner JILIN NORMAL UNIV
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