Почему наночастицы магнетит/золото со структурой ядро-оболочка недостаточно хороши и как их улучшить

In this paper a short review of experimental and theoretical recent researches of magnetic core-shell nanoparticles with noble metals shell is given. Magnetic nanoparticles of Fe3O4 coated with a gold shell are in demand in many biomedical applications. However, there are practically no good nanoparticles completely and uniformly coated with gold. In this paper, we investigated the formation of a chemical bond at the magnetite/gold interface. In the framework of DFT-GGA calculations, the geometric structure, electronic and magnetic properties of flat layers consisting of Fe3O4 magnetite, titanium, and gold are studied. It is established that the specific energy and wetting parameters of the magnetite-gold interface are negative, while these values of the magnetite-titanium (for thin Ti layers) and magnetite-titanium-gold boundaries are positive. This allows us to hope that an intermediate thin layer of titanium at the boundary between the surface of the magnetite nanoparticle and the gold layer will stabilize this three-layer structure and allow obtaining magnetite nanoparticles coated with a solid gold coating.

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Dynamic magnetic characterization and magnetic particle imaging enhancement of magnetic-gold core–shell nanoparticles

Nanoscale ◽

10.1039/c9nr00242a ◽

2019 ◽

Vol 11 (13) ◽

pp. 6489-6496 ◽

Cited By ~ 8

Author(s):

Asahi Tomitaka ◽

Satoshi Ota ◽

Kizuku Nishimoto ◽

Hamed Arami ◽

Yasushi Takemura ◽

...

Keyword(s):

Magnetic Particle ◽

Magnetic Core ◽

Gold Coating ◽

Shell Nanoparticles ◽

Gold Core ◽

Magnetic Particle Imaging ◽

Particle Imaging ◽

Core Shell Nanoparticles ◽

Imaging Performance ◽

Core Nanoparticles

The gold coating on magnetic core nanoparticles enhanced magnetic particle imaging performance due to an alteration in dynamic magnetic responses.

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Magnetic Core-Shell Nanoparticles for Biomedical Applications

Complex Magnetic Nanostructures ◽

10.1007/978-3-319-52087-2_12 ◽

2017 ◽

pp. 425-453 ◽

Cited By ~ 1

Author(s):

Samir Mandal ◽

Keya Chaudhuri

Keyword(s):

Biomedical Applications ◽

Magnetic Core ◽

Core Shell ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles

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Fabrication of copper(II)-coated magnetic core-shell nanoparticles Fe3O4@SiO2-2-aminobenzohydrazide and investigation of its catalytic application in the synthesis of 1,2,3-triazole compounds

Scientific Reports ◽

10.1038/s41598-021-81632-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

H. Rajabi-Moghaddam ◽

M. R. Naimi-Jamal ◽

M. Tajbakhsh

Keyword(s):

High Efficiency ◽

Click Reaction ◽

Magnetic Core ◽

Core Shell ◽

Isatoic Anhydride ◽

Shell Nanoparticles ◽

Triazole Derivatives ◽

Catalytic Application ◽

Ft Ir ◽

Core Shell Nanoparticles

AbstractIn the present work, an attempt has been made to synthesize the 1,2,3-triazole derivatives resulting from the click reaction, in a mild and green environment using the new copper(II)-coated magnetic core–shell nanoparticles Fe3O4@SiO2 modified by isatoic anhydride. The structure of the catalyst has been determined by XRD, FE-SEM, TGA, VSM, EDS, and FT-IR analyzes. The high efficiency and the ability to be recovered and reused for at least up to 6 consecutive runs are some superior properties of the catalyst.

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Multifunktionale bakterielle Nanomagnete für Biotechnologie und Medizin

BIOspektrum ◽

10.1007/s12268-021-1593-5 ◽

2021 ◽

Vol 27 (4) ◽

pp. 442-444

Author(s):

Frank Mickoleit ◽

Sabine Rosenfeldt ◽

Anna S. Schenk ◽

Dirk Schüler ◽

René Uebe

Keyword(s):

Particle Production ◽

Magnetotactic Bacteria ◽

Magnetic Core ◽

High Yield ◽

Core Shell ◽

Shell Nanoparticles ◽

Magnetospirillum Gryphiswaldense ◽

Core Shell Nanoparticles ◽

Genetic Toolkit ◽

The Way

AbstractBacterial magnetosomes represent magnetic core-shell nanoparticles biomineralized by magnetotactic bacteria like Magnetospirillum gryphiswaldense. The establishment of fermentation regimes for high-yield particle production, standardized isolation procedures as well as the development of a genetic toolkit for the generation of “tailored” particles might soon pave the way for the application of engineered magnetosomes in the biomedical and biotechnological field.

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