Composite particles whose nano magnetic iron oxide particles are assembled on surfaces of gold particles and method for preparing same

A nano-magnetic iron oxide, composite particle technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, inorganic material magnetism, etc., can solve the problems that have not been seen yet, and achieve the improvement of immobilization type and capacity, and large specific surface area. Effect

Active Publication Date: 2010-06-16
XIAN GOLDMAG NANOBIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Langmujr, 2008, 24 (12), 6232-6237 reported a gold nanorod modified by an oxide-coated polymer, the patent CN 1539793A publicly reported that the oxide-coated silicon dioxide was formed into a composite material, and the patent CN 1844264A publicly reported An oxide-coated titanium dioxide to form a composite material, but so far, there has been no report on the assembly of nano-oxide particle composites on the surface of gold particles

Method used

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  • Composite particles whose nano magnetic iron oxide particles are assembled on surfaces of gold particles and method for preparing same
  • Composite particles whose nano magnetic iron oxide particles are assembled on surfaces of gold particles and method for preparing same
  • Composite particles whose nano magnetic iron oxide particles are assembled on surfaces of gold particles and method for preparing same

Examples

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Embodiment 1

[0025] 1. Synthesis of oil-soluble Fe by hydrothermal method 3 o 4

[0026] Weigh 1.5gFeCl 3 ·6H 2 O, 1.0g FeCl 2 4H 2 0, 1.0g sodium oleate, mix it into the liner of 50ml hydrothermal synthesis kettle and put into stirring magnet, add 25ml ultrapure water, 3ml ethylene glycol, 3ml ethanol, the oleic acid of 2ml, hydrothermal The liner of the synthesis kettle was placed on a magnetic stirrer and stirred for 10 minutes to dissolve each component. Add 8ml of ammonia water into the hydrothermal synthesis kettle and stir for 20 minutes, take out the stirring magnet, put the liner into the hydrothermal synthesis kettle, and tighten the hydrothermal synthesis kettle. Put the hydrothermal synthesis kettle into an electric blast drying oven, and react for 10 hours at 170°C. Cool the reacted hydrothermal synthesis kettle to room temperature, take out the liner of the hydrothermal synthesis kettle, pour the sample into a beaker, add absolute ethanol, magnetically separate, pour t...

Embodiment 2

[0032] 1. Synthesis of oil-soluble Fe by hydrothermal method 3 o 4

[0033] Weigh 2.0gFeCl 3 ·6H 2 O, 1.0g FeCl 2 4H 2 O, 1.6g sodium oleate is mixed and poured into the liner of 100ml hydrothermal synthesis kettle and put into stirring magnet, add the oleic acid of 30ml ultrapure water, 10ml ethylene glycol, 10ml ethanol, 10ml, hydrothermal synthesis The liner of the kettle was placed on a magnetic stirrer and stirred for 10 minutes to dissolve the components. Add 10ml of ammonia water into the hydrothermal synthesis kettle and stir for 20 minutes, take out the stirring magnet, put the liner into the hydrothermal synthesis kettle, and tighten the hydrothermal synthesis kettle. Put the hydrothermal synthesis kettle into an electric blast drying oven, and react for 15 hours at 170°C. Cool the reacted hydrothermal synthesis kettle to room temperature, take out the liner of the hydrothermal synthesis kettle, pour the sample into a 200ml beaker, add absolute ethanol, magnet...

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Abstract

The invention relates to composite particles whose nano magnetic iron oxide particles are assembled on the surfaces of gold particles and a method for preparing the same. The composite particles comprise cores and nano magnetic iron oxide particles which are assembled on the surfaces of the cores. The composite particles are in the size of 20-200 nm, the cores are gold particles which are in the size of 10-100 nm, and the nano magnetic iron oxide particles are Fe3O4 or Gamma-Fe2O3 and are in the size of 5-50nm. The method for preparing the composite particles comprises the following steps: synthesizing the oil-soluble nano magnetic iron oxide particles with the hydrothermal process; dispersing the oil-soluble nano magnetic iron oxide particles in water phase with surfactant; mixing the water phase with AuCl-4 solution; adding an excessive amount of reducing agent to the mixture, and stirring the reducing agent to the mixture at normal temperature to make the reducing agent react with the mixture so as to reduce Au3+ to the gold particles; and assembling the nano magnetic iron oxide particles on the surfaces of the gold particles to obtain the composite particles whose nano magnetic iron oxide particles are assembled on the surfaces of gold particles. The composite particles have the nano-optical effect and large specific surface area. Because the nano magnetic iron oxide particles are assembled on the surfaces of gold particles, the silane modification of various functional groups can be realized easily, and the immobilization type and the content of the biomolecules can be increased.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and relates to a composite microparticle assembled on the surface of gold particles by using nanometer magnetic iron oxide particles and a preparation method of the composite microparticle. Background technique [0002] A variety of substances are combined to form a variety of composite structures, that is, to give composite materials many properties, such as optical, electrical, magnetic, mechanical, chemical and other properties, so they have a wide range of applications. Due to its magnetic responsiveness and special physical and chemical properties of composite materials, magnetic composite materials have been widely used in the separation and diagnosis of biomolecules, magnetically guided targeted therapy, medical image analysis and other fields. The composite material formed by the combination of gold and magnetic materials is characterized by gold's good biomolecular immobilizat...

Claims

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Application Information

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IPC IPC(8): H01F1/09H01F1/33B22F1/02C01G49/06C01G49/08
Inventor 崔亚丽惠文利陈超石峰
Owner XIAN GOLDMAG NANOBIOTECH
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