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Method for preparing polymer-coated nano-cluster core-shell microsphere

A technology of nanoclusters and polymers, applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve problems such as unstable applications and limitations

Inactive Publication Date: 2009-10-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the methods for preparing nanoclusters mainly include: using oil droplets as templates to prepare nanoclusters or synthesizing nanoclusters through intermolecular solubilization. , solar cells and other fields are greatly restricted, even if the surface is modified by polyvinylpyrrolidone (PVP) nanoclusters, the application is also greatly restricted due to the instability of PVP

Method used

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  • Method for preparing polymer-coated nano-cluster core-shell microsphere
  • Method for preparing polymer-coated nano-cluster core-shell microsphere
  • Method for preparing polymer-coated nano-cluster core-shell microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1: Synthesis of toluene-phase gold nanoparticles

[0032] Gold nanoparticles stabilized by octadecyl p-vinylbenzyl-dimethylammonium chloride (OVDAC) were prepared in chloroform by a two-phase method: first, 105 mg of OVDAC was fully dissolved in 15 ml of chloroform, and mixed with 30mmol / L of HAuCl 4 Mix 5ml of the aqueous solution, stir vigorously for 30min, add 4ml of the aqueous solution containing 64mg of sodium borohydride dropwise, and continue to stir. After the reaction is finished, separate the organic phase with a separatory funnel, remove the chloroform in the system by volatilization and add 15ml of toluene to obtain Gold nanoparticles stabilized by OVDAC in the toluene phase. As shown in Fig. 1(a), we successfully synthesized spherical gold nanoparticles with a diameter of 6 nm in the toluene phase.

[0033] 2: Synthesis of gold nanoclusters

[0034] Get the OVDAC stable concentration of 5ml of the toluene phase prepared by the above steps to be 13mg / ml ...

Embodiment 2

[0038] 1: The method for the synthesis of toluene-phase gold nanoparticles is as described in Example 1

[0039]2: The synthesis of gold nanoclusters is as described in Example 1

[0040] 3: Preparation of polymer-coated gold nanocluster core-shell microspheres

[0041] Using the in-situ polymerization method, mix 0.5ml of the synthesized gold nanocluster aqueous solution with 5ml of 1.14mmol / L pyrrole monomer, stir for 30min, then add 1ml of FeCl-containing 3 80.01g of aqueous solution, the solution turned black at this time, and the solution was stirred for 24 hours. After the reaction was completed, the product was separated from the system by centrifugation under the condition of 30080 rpm. From the scanning electron micrographs and transmission electron micrographs shown in Figure 4(b), we can see that the outer surface of the gold nanoclusters with a size of 100nm-200nm is covered with a polymer shell layer with a thickness of 10nm. The thickness of the polymer shell ...

Embodiment 3

[0043] 1: The method for the synthesis of toluene-phase gold nanoparticles is as described in Example 1

[0044] 2: The synthesis of gold nanoclusters is as described in Example 1

[0045] 3: Preparation of polymer-coated gold nanocluster core-shell microspheres

[0046] Using the method of in-situ polymerization, mix 0.5ml of the synthesized gold nanocluster aqueous solution with 5ml of 2.28mmol / L pyrrole monomer, stir for 30min, then add 1ml of FeCl-containing 3 0.01 g of aqueous solution, the solution turned black at this time, and the solution was continuously stirred for 24 hours. After the reaction was completed, the product was separated from the system by centrifugation under the condition of 3000 rpm. From the SEM and TEM photos shown in Figure 4(c), we can see that the outer surface of the gold nanoclusters with a size of 100nm-200nm is covered with a polymer shell with a thickness of 16nm.

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Abstract

The invention relates to a method for preparing a core-shell microsphere taking nano-cluster as a core and polymer as a shell by an in-situ polymerization method. The method comprises three steps of preparing nano-particles, preparing the nano-cluster and preparing the core-shell microsphere, wherein the organic phase nano-particles can be prepared by a two-phase method, a phase transfer method or a high-temperature thermal decomposition method; the nano-cluster is prepared by a method of taking oil drops as a template; the polymer shell is prepared by adopting the in-situ polymerization method; the size of the microsphere can be regulated by changing the amount of surfactant; and the thickness of the polymer shell can be achieved by adjusting the concentration of polymeric monomer. The method is a novel method combining the nano-luster with the polymer. The polymer-coated nano-cluster core-shell microsphere prepared by the method not only improves the stability and biocompatibility of the nano-cluster, but also introduces new chemical functions so as to integrate the functions of the nano-cluster and the polymer. Therefore, the method provides the novel multifunctional material with good stability for research on biomarkers, drug detection and sensors.

Description

technical field [0001] The invention belongs to the technical field of nano-cluster core-shell microspheres, and specifically relates to a method for preparing polymer-coated nano-cluster core-shell microspheres with nano-clusters as cores and polymers as shells by in-situ polymerization. Background technique [0002] Nanoclusters formed by the assembly of nanoparticles, such as metal nanoclusters, semiconductor nanoclusters, and oxide nanoclusters, have great potential in the fields of biosensors, responsive materials, solar cells, and catalytic chemistry due to their special physical and chemical properties. Potential application value has attracted extensive attention of researchers. At present, the methods for preparing nanoclusters mainly include: using oil droplets as templates to prepare nanoclusters or synthesizing nanoclusters through intermolecular solubilization. , solar cells and other fields are greatly restricted, even if the surface is modified by polyvinylpy...

Claims

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Application Information

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IPC IPC(8): B82B3/00
Inventor 张皓吴杰张雪杨柏
Owner JILIN UNIV
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