Core/Shell NPs

Highly Magnetic Core–Shell Nanoparticles with a Unique Magnetization Mechanism.
Tae-Jong Yoon, Hakho Lee, Huilin Shao, and Ralph Weissleder
 Angew. Chem. Int. Ed. 50, 4663 (2011)

A new approach to preparing highly magnetic nanoparticles consisting of a ferromagnetic core (Fe) and an artificial ferrite shell was developed. The monometallic core contributes to high overall magnetization.