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A method for the construction of nanoheterostructures based on platinized iron nanoparticles

A nano-heterostructure, iron nano-technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve problems such as unfavorable large-scale preparation technology and complex reaction system, and achieve controllability The effect of strong, simplified reaction system and cost saving

Inactive Publication Date: 2017-08-25
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods often require nearly harsh condition control and complex reaction systems, which are extremely unfavorable for the development of large-scale preparation technologies

Method used

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  • A method for the construction of nanoheterostructures based on platinized iron nanoparticles
  • A method for the construction of nanoheterostructures based on platinized iron nanoparticles
  • A method for the construction of nanoheterostructures based on platinized iron nanoparticles

Examples

Experimental program
Comparison scheme
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 constructing nano-heterogeneous structures based on platinum iron nanoparticles. Use platinum iron nanoparticles as seeds to induce subsequent growth of various materials on its surface, thereby constructing a nano-heterogeneous structure material including a magnetic platinum iron part and a subsequent growth part; the particle size of the platinum iron nanoparticles is greater than 1nm , less than 10nm; the subsequent growth part includes iron oxide materials, II-VI group element semiconductor materials and noble metal materials. The method of the present invention can be used in a simple oleylamine system, with platinum iron nanoparticles as seeds, and through simple control of basic reaction conditions such as temperature, time, and subsequent feeding amount of the second material precursor, to achieve the preparation of different types of multifunctional The purpose of nano-heterogeneous materials. The preparation method of the invention has simple system, good universality and strong controllability, and is suitable for repeated production of multifunctional nanometer heterogeneous materials based on magnetic nanoparticles in large batches.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01B82Y30/00A61K49/00A61K47/02
Inventor 沙印林郑强
Owner PEKING UNIV
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