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Methods for synthesizing AgNPs and preparing transplantable self-assembly film from AgNPs

A self-assembly, thin-film technology, applied in metal material coating process, nanotechnology, coating and other directions, can solve the problems of easy clustering and poor dispersion of nanoparticles, and achieve easy acquisition, good dispersion, and high market promotion prospects. Effect

Inactive Publication Date: 2020-05-01
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, when nanoparticles are self-assembled, they will produce collective physical properties different from monodisperse particles, so the self-assembly of nanoparticles has been a long-term focus of researchers, but the nanoparticles prepared by green synthesis have poor dispersion and easy clustering, etc. However, there are few reports on the green synthesis of self-assembled films of silver nanoparticles

Method used

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  • Methods for synthesizing AgNPs and preparing transplantable self-assembly film from AgNPs
  • Methods for synthesizing AgNPs and preparing transplantable self-assembly film from AgNPs
  • Methods for synthesizing AgNPs and preparing transplantable self-assembly film from AgNPs

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: a kind of method of synthesizing AgNPs, with AgNO 3 As a silver source and Ginkgo biloba extract, the reaction solution is centrifuged, and the black precipitate obtained is AgNPs.

[0032] The preparation steps of the ginkgo leaf extract include: (1) the ginkgo leaves are dried, crushed and sieved to obtain the ginkgo leaf dry powder; (2) the ginkgo leaf dry powder is extracted with methanol, and the supernatant is taken; (3) the supernatant is The solution is rotary evaporated by a rotary evaporator to obtain a concentrated solution; (4) the concentrated solution is transferred to a chromatography column for elution to obtain an eluent; (5) the eluent is rotary evaporated by a rotary evaporator to obtain a ginkgo biloba leaf extract;

[0033] The specific implementation of the step (1) is to wash the ginkgo leaves three times with deionized water, clean and remove impurities such as dirt and dust on the surface of the ginkgo leaves; then dry the cleaned...

Embodiment 2

[0039] Embodiment 2: The method for preparing a transplantable self-assembled film with the AgNPs obtained by the method described in Example 1 includes the following steps, redispersing the obtained AgNPs in deionized water to obtain a silver nano solution; preparing a 4 cm diameter Glass weighing dish, pipette the silver nano solution to the glass weighing dish; add n-hexane dropwise above the silver nano solution to form an oil-water interface; slowly add absolute ethanol dropwise to the needle tube with a needle at the oil-water interface, as the absolute ethanol During the gradual dropwise addition process, a metallic luster silver nanometer self-assembled film was formed at the oil-water interface; by adjusting the amount of AgNPs solution, AgNPs self-assembled films of different sizes could be realized. Wherein, the dropping amount of n-hexane is 5 mL, and the dropping amount of absolute ethanol is 3 mL.

[0040] Let the weighing dish stand still, wait for the n-hexane ...

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Abstract

The invention discloses methods for synthesizing AgNPs and preparing a transplantable self-assembly film from AgNPs. AgNO3 is taken as a silver source and is subjected to a reaction with a folium ginkgo extracting solution, the method has the characteristics of being low in cost, high in reduction efficiency, simple in experiment process, good in biocompatibility, green and sustainable, and prepared silver nanoparticles have uniform sizes and morphology and good dispersity. The AgNPs transplantable self-assembly film prepared with the provided method has the characteristics that preparation equipment is simple, a self-assembly area is controllable, and the self-assembly film is uniform and transplantable.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method for synthesizing AgNPs and a transplantable self-assembled film. Background technique [0002] Silver nanoparticles (AgNPs) have been widely used in microelectronics and superconducting devices due to their excellent electrical conductivity. In addition, AgNPs are used as a surface-enhanced Raman scattering (SERS) substrate due to their unique plasmon resonance effect, which can realize the trace detection of drugs and pesticide residue molecules. , showing a huge market prospect in the field of nano-biomedicine. However, the wide application prospect of AgNPs puts forward higher requirements for the preparation of nanoparticles. Traditional physical methods (lithography, ball milling, sputtering) to prepare nano-particles are subject to high requirements for equipment. Chemical preparation of nanoparticles usually introduces toxic reducing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C23C24/00B82Y40/00
CPCB22F9/24B82Y40/00C23C24/00
Inventor 万艳芬杨鹏胡大峰
Owner YUNNAN UNIV