Preparation method of novel nano-material used for biosensor

A biosensor and nanomaterial technology, applied in the field of preparation of new nanomaterials, can solve the problems of high surface energy, easy to be oxidized, poor dispersion, etc., achieve good paramagnetism and magnetic responsiveness, and the preparation method is simple and easy, high The effect of antioxidant capacity

Inactive Publication Date: 2015-02-18
常熟市微尘电器有限公司
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Problems solved by technology

At present, the preparation and purification process of magnetic nanoparticles is not perfect enough. Nano-sized magnetic particles are easy to agglomerate and have poor dispersion due to their high surface energy. The magnetic orientation, biocompatibility and thermal stability of magnetic nanoparticles have not been fully utilized, thus affecting the detection sensitivity of biosensors, the speed of biochemical reactions and the throughput of detection.

Method used

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  • Preparation method of novel nano-material used for biosensor

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preparation example Construction

[0019] figure 1 It is a process step diagram of a novel nanomaterial preparation method for a biosensor in an embodiment of the present invention; the novel nanomaterial is a walnut-structured maghemite / silicon dioxide composite magnetic nanoparticle, and the preparation method includes the following steps: a) preparation of maghemite nanoparticles, b) hydrolysis and condensation treatment of maghemite nanoparticles, c) washing and drying treatment.

[0020] The preparation method of the novel nanomaterial used for biosensors mentioned in the present invention is by adding the maghemite nanoparticles with a particle diameter of about 40nm into the tetraethyl orthosilicate gel system, hydrolyzing and condensing, and using The maghemite / silica composite magnetic nanoparticles with core-shell structure were prepared by sol-gel method. The silica in the composite magnetic nanoparticles has excellent chemical stability and high temperature resistance. At the same time, the unsatur...

Embodiment

[0022] The specific preparation method is as follows:

[0023] a) Preparation of maghemite nanoparticles, the specific preparation process is as follows: first put ferric chloride powder and sodium hydroxide powder into a grinder at a mass ratio of 7:4, and then add polyethylene glycol-200 to continue grinding for 30 minutes , wherein, the dosage ratio of polyethylene glycol-200 and ferric chloride powder is 1.25ml / g; then the product after grinding is repeatedly washed three times with deionized water and absolute ethanol, and put into Dry in a vacuum oven at 70°C for 2 hours to obtain a precursor product; finally, roast the precursor product at 500°C for 1 hour to obtain maghemite nanoparticles.

[0024] b) Hydrolysis and condensation treatment of maghemite nanoparticles. The specific preparation process is as follows: first, add a certain amount of prepared maghemite nanoparticles into a container containing absolute ethanol and water, and ultrasonically disperse them for 3...

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Abstract

The invention provides a preparation method of a novel nano-material used for a biosensor. The novel nano-material comprises maghemite / silica composite magnetic nanoparticles of walnut structures. The preparation method comprises the following steps: (a) preparing maghemite nanoparticles; (b) hydrolyzing and condensing the maghemite nanoparticles; (c) washing and drying. The invention discloses the preparation method of the novel nano-material used for the biosensor. The preparation method is simple, practicable, efficient and reasonable; the prepared nano-material has excellent paramagnetism and mangnetic responsiveness, and is higher in dispersibility and oxidation resistance.

Description

technical field [0001] The invention relates to an electronic material, in particular to a method for preparing a novel nanometer material used in a biosensor, and belongs to the technical field of electronic materials. Background technique [0002] Electronic materials are the material basis for the development of modern electronics industry and science and technology. They mainly refer to materials used in electronic technology and microelectronic technology, including dielectric materials, semiconductor materials, piezoelectric and ferroelectric materials, conductive metals and their alloy materials. , magnetic materials, optoelectronic materials and other related materials. Electronic materials cover a wide range of materials whose main function is to be optically functional or affect the electrical properties of the product. At present, electronic materials are mainly used in industries such as IC manufacturing, flat panel displays, structures, printed circuit boards, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00G01N27/00B82Y40/00
Inventor 马进
Owner 常熟市微尘电器有限公司
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