Novel method of manufacturing Fe3O4/Au magnetic complex nano particle

A magnetic composite nanotechnology, a new method, applied in the field of preparing Fe3O4/Au magnetic composite nanoparticles, can solve problems that have not yet been discovered, and achieve the effects of particle magnetic control, high saturation magnetization, and high cost

Inactive Publication Date: 2008-01-23
HUNAN UNIV OF TECH +3
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Problems solved by technology

In 2003, Li et al. used sonochemical method to prepare Fe-Co magnetic composite nanoparticles with core-shell structure. Sivakumar et al. prepared LaFeO2 by sonochemical method in 2004. 3 Nanocrystalline, Nikitenko et al prepared Fe-Fe by sonochemical method 3 C nanocrystalline particles, but there is no report on the preparation of Fe oxide / Au by this method

Method used

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Embodiment approach 1

[0018] The invention relates to a sonochemical method for preparing Fe 3 o 4 / Au magnetic composite particles. Specifically as follows: 1) get 2gFeCl respectively 2 4H 2 O and 5.2 g FeCl 3 ·6H 2 O and 0.85 mL of concentrated hydrochloric acid of 12.1 mol / L were dissolved in 200 mL of H 2 O, ultrasonic deoxygenation, and then the above solution was added dropwise to 250mL, 0.75mol / L NaOH solution, all reactions were carried out at a temperature of 80°C, stirring, N 2 under protection. As the reaction progressed, a black precipitate appeared in the reaction solution. After the reaction, the obtained precipitate was separated from the reaction medium by using an external magnetic field, and washed three times with deionized water and twice with ethanol. Finally Fe 3 o 4 Nanoparticles were made into an ethanol solution with a concentration of 5g / L. 2) Dilute the above 25mL solution to 150mL with ethanol and 1mL water, in order to better disperse Fe 3 o 4 particles, th...

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Abstract

The invention discloses a new compound Fe3O4/Au magnetic compound Nami grain method, which is characterized in that: the invention utilizes supersonic chemical method to restore gold ion on a amino or hydrosulfuryl functional magnetic Nami grain to realize the preparation of the sample. The method doesn't need purifying product, which is quick and directviewing and is a novel compound method with simple and quick operation and high yield.

Description

Technical field [0001] The present invention relates to a kind of preparation Fe 3 o 4 A new approach to Au / Au magnetic composite nanoparticles. Background technique [0002] Magnetic nanoparticles are a new type of material developed in recent years. Due to their special magnetic orientation, superparamagnetism, and the ability to connect biochemically active functional groups on the surface, magnetic nanoparticles are widely used in nucleic acid analysis, clinical diagnosis, and so on. The application of targeted drugs, cell separation and enzyme immobilization has been widely developed. Applying these properties to biosensors can significantly improve the sensitivity of biosensor detection, shorten the time of biochemical reactions, and increase the throughput of detection. It opens up broad prospects for the field of biosensors. In recent years, due to the characteristics of simple preparation, outstanding optical properties and easy modification of gold-magnetic comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24H01F1/11
Inventor 贺全国吴伟陈洪
Owner HUNAN UNIV OF TECH
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