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Preparation method of shape-controllable gold nanocrystal/poly(3, 4-ethylene dioxythiophene) core-shell nanomaterial

A technology of ethylenedioxythiophene and core-shell nanomaterials is applied in the field of preparation of gold nanocrystals/polycore-shell nanomaterials, and can solve the problem that the preparation has not been reported, the size of core-shell nanostructures cannot be smaller than 150nm, and the gold nanoparticles The shape can not be controlled and other problems, to achieve the effect of simple preparation method and high production efficiency

Active Publication Date: 2018-03-13
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shape of gold nanoparticles obtained by this one-step synthesis method cannot be regulated, and the size of the obtained core-shell nanostructure cannot be smaller than 150nm
So far, the preparation of poly(3,4-ethylenedioxythiophene) shell structures on the surface of non-spherical gold nanocrystals has not been reported

Method used

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  • Preparation method of shape-controllable gold nanocrystal/poly(3, 4-ethylene dioxythiophene) core-shell nanomaterial
  • Preparation method of shape-controllable gold nanocrystal/poly(3, 4-ethylene dioxythiophene) core-shell nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0024] Dissolve 4mg of 3,4-ethylenedioxythiophene monomer in 1.8mL, 7mmol / L sodium lauryl sulfate aqueous solution, then add 0.018mL of isopropanol, stir at room temperature for 30min, and the rod-shaped gold Nanocrystals (the average length is 88 ± 5nm, and the average diameter is 45 ± 3nm) are added and dispersed in the above-mentioned solution, the molar concentration ratio of rod-shaped gold nanocrystals and 3,4-ethylenedioxythiophene monomer in this solution 9×10 13 After mixing and shaking for 15 minutes, 7.6 mg of potassium persulfate was dissolved in 1.5 mL of hydrochloric acid and mixed and shaken with the above solution for 7 minutes, and then reacted at room temperature for 8 hours to obtain rod-shaped gold nanocrystals / poly(3,4-ethylenedioxythiophene ) core-shell nanomaterials. The microstructure of the material is as figure 1 As shown in a, it can be clearly seen that poly(3,4-ethylenedioxythiophene) has formed a uniform shell structure on the surface of rod-sha...

Embodiment 2

[0026] Dissolve 5 mg of 3,4-ethylenedioxythiophene monomer in 1.8 mL, 7 mmol / L aqueous solution of sodium dodecylbenzenesulfonate, then add 0.18 mL of isopropanol, stir at room temperature for 30 min, and Bipyramidal gold nanocrystals (average diameter of 165 ± 5nm, 56 ± 1nm) are added and dispersed in the above-mentioned solution, bipyramidal gold nanocrystals and 3,4-ethylenedioxythiophene monomers are in this solution The molar concentration ratio in is 1×10 13 After mixing and shaking for 15 minutes, 8.03 mg of ammonium persulfate was dissolved in 1.5 mL of hydrochloric acid and mixed with the above solution for 7 minutes, and then reacted at room temperature for 8 hours to obtain bipyramidal gold nanocrystals / poly(3,4-ethylenedi Oxythiophene) core-shell nanomaterials. The microstructure of the prepared core-shell nanomaterials is as follows: figure 2 As shown in a, it can be clearly seen from the figure that poly(3,4-ethylenedioxythiophene) forms a uniform shell struct...

Embodiment 3

[0028] Dissolve 10mg of 3,4-ethylenedioxythiophene monomer in 1.8mL, 0.042mol / L aqueous solution of sodium lauryl sulfate, then add 0.036mL of isopropanol, stir at room temperature for 30min, and form spherical Gold nanocrystals (average diameter of 84 ± 5nm) are added and dispersed in the above-mentioned solution. The molar concentration ratio of spherical gold nanocrystals and 3,4-ethylenedioxythiophene monomer in this solution is 1×10 13 After mixing and shaking for 15 minutes, 16.06 mg of ammonium persulfate was dissolved in 1.5 mL of hydrochloric acid and mixed with the above solution for 7 minutes, and then reacted at room temperature for 8 hours to obtain bipyramidal gold nanocrystals / poly(3,4-ethylenedi Oxythiophene) core-shell nanomaterials. Poly(3,4-ethylenedioxythiophene) forms a uniform shell structure on the surface of biconical gold nanocrystals, and the thickness of the shell is about 28nm. The absorption peaks of the longitudinally localized surface plasmon re...

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Abstract

The invention discloses a preparation method of a shape-controllable gold nanocrystal / poly(3, 4-ethylene dioxythiophene) core-shell nanomaterial. The preparation method includes following steps: (1),dissolving 3, 4-ethylene dioxythiophene monomer in a water solution of an anionic surfactant, adding a proper amount of isopropanol, and stirring at room temperature for 1-5h; (2), adding gold nanocrystals with specific shape and size, dispersing the same into a material obtain in the step (1), and mixing and oscillating for 10-30min; (3), dissolving an oxidant in protonic acid, mixing and oscillating with a material obtained in the step (2) for 3-10min, and allowing reaction at room temperature for 5-8h. High affinity between sulfur atoms in 3, 4-ethylene dioxythiophene molecules and the goldnanocrystals is utilized to enable 3, 4-ethylene dioxythiophene to be polymerized in situ on the surfaces of the gold nanocrystals so as to form an nm shell layer structure under stable action of theanionic surfactant.

Description

technical field [0001] The invention belongs to the technical field of noble metal / conductive polymer composite nanomaterials, in particular to a method for preparing a shape-controllable gold nanocrystal / poly(3,4-ethylenedioxythiophene) core-shell nanomaterial. Background technique [0002] Gold nanocrystals are a kind of noble metal nanomaterials that have attracted the attention of scientists in recent years. Due to its unique localized surface plasmon resonance properties, it has shown broad application prospects in the fields of nanobiology, catalysis, optics, and electricity. The LSPR properties depend on the shape and size of gold nanocrystals. Compared with spherical gold nanocrystals, rod-shaped, plate-shaped and biconical gold nanocrystals exhibit higher wavelength localized surface plasmon resonance absorption peaks, which in turn can strongly absorb and scatter near-infrared light. . This makes gold nanocrystals of these shapes uniquely advantageous in the fie...

Claims

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Application Information

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IPC IPC(8): C08G61/12C08K3/08C08K7/00
CPCC08G61/126C08G2261/11C08G2261/3223C08K3/08C08K7/00C08K7/18C08K2003/0831C08K2201/003C08K2201/004C08K2201/011
Inventor 蒋妮娜王士斌马丽娟梁丽丽陈爱政
Owner HUAQIAO UNIVERSITY
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