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Polycarbonate/silver composite surface-enhanced Raman substrate and preparation method

A technology of composite surface and enhanced Raman scattering, applied in the direction of Raman scattering, single-component polyester rayon, rayon manufacturing, etc., can solve the effect of size, spacing and arrangement of substrates, and the tedious preparation of silver nanoparticle substrates , difficult to prepare in large quantities, etc., to achieve the effects of low cost, high sensitivity, and improved enhancement effect

Inactive Publication Date: 2019-05-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to its high surface activity and other characteristics, silver nanoparticles are widely used in the preparation of surface-enhanced Raman spectroscopy substrates, but their size, spacing and arrangement will have a significant impact on the substrate effect
Preparation of silver nanoparticle substrates with uniform particle size and reasonable gaps currently has defects such as cumbersome preparation, high cost, and difficulty in mass production.

Method used

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  • Polycarbonate/silver composite surface-enhanced Raman substrate and preparation method
  • Polycarbonate/silver composite surface-enhanced Raman substrate and preparation method
  • Polycarbonate/silver composite surface-enhanced Raman substrate and preparation method

Examples

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Effect test

Embodiment 1

[0027] This example discloses a method for preparing a polycarbonate / silver composite surface-enhanced Raman substrate by combining electrospinning and in-situ chemical reduction technology, which specifically includes the following steps:

[0028] (1) Poly(bisphenol A) carbonate particles and silver nitrate were dissolved in a mixed solvent of tetrahydrofuran and dimethylformamide (volume ratio 6:4) according to the mass fraction of 14wt% and 4.5wt%, respectively, to prepare a polymer solution ;

[0029] (2) Fix the aluminum foil on the receiving device of the electrospinning machine, put the polymer solution into the syringe and place it on the injection table, adjust the positive high voltage to 15.0kv, the negative high voltage to -1.5kv, and the injection speed to 0.5ml / L , the experimental temperature is 30°C, the humidity is 20%, the spinning time is 5min, and polycarbonate nanofibers containing silver nitrate are obtained;

[0030] (3) Place the nanofibers obtained in...

Embodiment 2

[0033] This example discloses a method for preparing a polycarbonate / silver composite surface-enhanced Raman substrate by combining electrospinning and in-situ chemical reduction technology, which specifically includes the following steps:

[0034] (1) Poly(bisphenol A) carbonate particles and silver nitrate were dissolved in a mixed solvent of tetrahydrofuran and dimethylformamide (volume ratio 6:4) according to the mass fraction of 14wt% and 2.3wt%, respectively, to prepare a polymer solution ;

[0035] (2) Fix the aluminum foil on the receiving device of the electrospinning machine, put the polymer solution into the syringe and place it on the injection table, adjust the positive high voltage to 14.0kv, the negative high voltage to -1.5kv, and the injection speed to 0.6ml / L , the experimental temperature is 40°C, the humidity is 25%, and the spinning time is 10min, and polycarbonate nanofibers containing silver nitrate are obtained;

[0036] (3) The nanofibers obtained in ...

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Abstract

The invention discloses a polycarbonate / silver composite surface-enhanced Raman substrate and a preparation method. The substrate is obtained by arranging a poly(bisphenol A) carbonate thin-film dopedwith silver nano-particles on a substrate surface; the preparation method is as follows: arranging the poly(bisphenol A) carbonate thin-film doped with silver nano-particles on the substrate surface;and then reducing a layer of homogeneous silver nano-particles on the thin-film surface by adopting an in-situ chemical reduction method, thereby obtaining the surface-enhanced Raman scattering substrate. The surface-enhanced Raman substrate is simple in preparation, low in cost, and has good surface-enhanced Raman effect and stability.

Description

technical field [0001] The invention belongs to the technical field of trace organic matter detection, and relates to a polycarbonate / silver composite surface-enhanced Raman scattering substrate and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering spectroscopy (SERS) technology is widely used in analytical chemistry, life science, medicine and other fields, and has the characteristics of fast response, accuracy and sensitivity, and no damage to samples. This method requires the use of metals such as Au, Ag, and Cu to prepare surface-enhanced Raman substrates with rough surfaces, and the Ag substrate has the best effect. [0003] Due to its high surface activity and other characteristics, silver nanoparticles are widely used in the preparation of surface-enhanced Raman spectroscopy substrates, but their size, spacing and arrangement will have a significant impact on the substrate effect. The preparation of silver nanoparticle subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65D01F6/92D01F1/10
Inventor 陆锐王连军李易李健生孙秀云沈锦优韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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