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Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

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Core-Shell Magnetic Particles: Tailored Synthesis and Applications.

Yidong Zou^1,2, Zhenkun Sun¹, Qiyue Wang^3,4

¹Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and State Key Laboratory of Molecular Engineering of Polymers, iChEM, Fudan University, Shanghai 200433, P. R. China.

Chemical Reviews

|December 27, 2024

Summary

This summary is machine-generated.

Core-shell magnetic particles offer tunable properties for diverse applications. This review details their synthesis, interface engineering, and potential in fields like biomedicine and catalysis.

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Area of Science:

Materials Science
Chemistry
Biomedicine

Background:

Core-shell magnetic particles combine magnetic cores with functional shells, attracting multidisciplinary interest.
Their unique magnetic properties, tunable interfaces, and designed compositions are key to their utility.

Purpose of the Study:

To review synthesis methods, regulating strategies, interface engineering, and applications of core-shell magnetic particles over the past 50 years.
To elucidate fundamental methodologies for controllable synthesis and discuss influences on physicochemical properties.

Main Methods:

Surface engineering strategies to impart desired properties like hydrophilicity and target recognition.
Precise control over shell features (thickness, porosity, composition) including oxides, carbon, silica, polymers, and MOFs.

Main Results:

Detailed elucidation of synthesis methodologies for diverse compositions, morphologies, and interface properties.
Discussion on how synthesis conditions affect dispersibility, stability, stimulus-responsiveness, and surface functionality.

Conclusions:

Core-shell magnetic particles offer significant potential in catalysis, environmental remediation, and biomedicine.
"Core-shell assembly chemistry" shows promise for bioimaging, diagnosis, micro/nanorobots, and smart catalysis.
Future directions include addressing challenges and exploring novel applications.