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Related Experiment Video

Updated: Apr 26, 2026

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

Published on: November 10, 2017

Template-directed FeCo nanoshells on AuCu.

Maogang Gong¹, Alec Kirkeminde, Ralph Skomski

¹Department of Chemistry, University of Kansas, Lawrence, KS, 66045, USA.

Small (Weinheim an Der Bergstrasse, Germany)

|July 22, 2014

Summary

Researchers developed novel core-shell magnetic nanoparticles. The non-magnetic core induced a magnetic vortex state in the iron-cobalt shell, advancing nanomaterial science.

Keywords:

AuCu FeCo core/shell nanoparticles nanomagnetism vortex

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Last Updated: Apr 26, 2026

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Area of Science:

Materials Science
Nanotechnology
Magnetism

Background:

Core-shell nanostructures offer tunable magnetic properties.
Controlling magnetic states in nanoparticles is crucial for applications.

Purpose of the Study:

To synthesize and characterize AuCu/FeCo core-shell magnetic nanoparticles.
To investigate the magnetic state transitions in the FeCo shell due to the non-magnetic core.

Main Methods:

Precise synthesis of iron-cobalt (FeCo) shell on non-magnetic gold-copper (AuCu) core.
Characterization of the resulting core-shell nanostructures.

Main Results:

Successfully formed AuCu/FeCo core-shell nanostructures.
Observed a transition in the FeCo shell from a single magnetic domain to a magnetic vortex state.
Attributed the magnetic state transition to the influence of the non-magnetic AuCu core.

Conclusions:

The non-magnetic AuCu core effectively controls the magnetic behavior of the FeCo shell.
AuCu/FeCo core-shell nanoparticles exhibit tunable magnetic states, opening possibilities for advanced magnetic applications.