Method for establishing nanometer heterostructure based on FePt nanometer particles

A nano-heterostructure and iron-nano technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as unfavorable large-scale preparation technology and complex reaction systems, and achieve controllability Strong, simplified reaction system, cost-saving effect

Inactive Publication Date: 2014-11-19
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods often require nearly harsh condition control and complex reaction syste

Method used

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  • Method for establishing nanometer heterostructure based on FePt nanometer particles
  • Method for establishing nanometer heterostructure based on FePt nanometer particles
  • Method for establishing nanometer heterostructure based on FePt nanometer particles

Examples

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Effect test

Embodiment 1

[0046] Example 1: Synthesis of FePt (2nm) nanoparticles

[0047] 3 mmol iron acetylacetonate Fe (acac) 3 , 3mmol platinum acetylacetonate Pt (acac) 2 , 1ml (3mmol) oleic acid, 1ml (3mmol) oleylamine and 20ml TOA were placed in a three-necked flask with a volume of 100ml, heated to 280°C under the protection of Ar, and reacted for 1 hour to obtain a black solution; after removing impurities, the diameter 2nm FePt magnetic nanoparticles.

[0048] figure 1 Schematic diagram of the experimental setup for the preparation process of iron platinum (FePt) nanoparticles;

[0049] figure 2 It is the morphology of platinum iron 2nm FePt nanoparticles under electron microscope (TEM);

Embodiment 2

[0050] Example 2: Synthesis of FePt (5nm) nanoparticles

[0051] 3 mmol iron acetylacetonate Fe (acac) 3 , 3mmol platinum acetylacetonate Pt (acac) 2 , 6ml (18mmol) oleic acid, 6ml (18mmol) oleylamine and 20ml TOA were placed in a three-necked flask with a volume of 100ml, heated to 280°C under the protection of Ar, and reacted for 1 hour to obtain a black solution; after removing impurities, the diameter 5nm FePt magnetic nanoparticles.

Embodiment 3

[0052] Example 3: FePt-Fe 3 o 4 (2nm-6nm) nano heterogeneous particles

[0053] Put 10mg of FePt (2nm) in a 50ml three-neck flask containing 10ml of oleylamine (OAm), heat to 200°C until FePt is completely dissolved, then add 0.1mmol of iron oleate (Fe-Oleate), continue to heat to 250°C for reaction 1h to obtain a brown-black solution. Add 50ml of ethanol (excessive amount) to precipitate nano-heterogeneous particles, remove the reaction precursor iron oleate and reaction solvent oleylamine that did not participate in the reaction, and then vacuum-dry to obtain the magnetic part and subsequent growth part with diameters of 2nm-6nm FePt respectively -Fe 3 o 4 Nano-heterogeneous particles.

[0054] image 3 Schematic diagram of the preparation process for constructing nano-heterostructures based on FePt nanoparticles;

[0055] Figure 4 Schematic diagram of the experimental setup for the preparation process of nano-heterostructures based on FePt nanoparticles;

[0056] ...

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Abstract

The invention relates to a method for establishing a nanometer heterostructure based on FePt nanometer particles. The FePt nanometer particles serve as seeds, multiple materials are induced to grow on the surfaces of the FePt nanometer particles in a follow-up mode, and then nanometer heterostructure materials containing magnetic FePt parts and follow-up growth parts are established, wherein the diameter of the FePt nanometer particles is larger than 1 nm and smaller than 10 nm, and the follow-up growth parts comprise iron oxide materials, semiconductor materials of II-VI group elements and noble metal materials. According to the method, in a simple oleylamine system, the FePt nanometer particles serve as the seeds, and by simply controlling fundamental reaction conditions such as temperature, time and the charging number of follow-up second material precursors, the multifunctional nanometer heterogeneous materials of different types are prepared. The preparation method is simple in system, good in universality, high in controllability and suitable for large-batch repeated production of the multifunctional nanometer heterogeneous materials based on the magnetic nanometer particles.

Description

technical field [0001] The present invention relates to a method for constructing various nano-heterogeneous structures, in particular to a method for constructing various nano-heterogeneous structure materials based on platinum iron nanoparticles and the obtained nano-heterogeneous structure particles and their biological and medical applications. Applications in the field of materials technology. Background technique [0002] The construction of nanoparticles is limited in a narrow scale, which makes them have many unique physical and chemical properties compared with macroscopic materials, such as special optical and magnetic properties; interesting surface and structural properties, etc. In addition, nanoparticles belong to the same category as antibodies, membrane receptors, nucleic acids, proteins, and many other biomolecules in terms of scale. Combined with their high specific surface area and adjustable properties, nanoparticles have great potential in imaging, diagn...

Claims

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Application Information

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IPC IPC(8): H01F1/01B82Y30/00A61K49/00A61K47/02
Inventor 沙印林郑强
Owner PEKING UNIV
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