Synthesis and in vitro cellular interactions of superparamagnetic iron nanoparticles with a crystalline gold shell

- A novel synthetic protocol for Fe@Au nanoparticles (NPs) has been optimized.
- Surface functionalization and characterization of Fe@Au NPs.
- NPs retain superparamagnetic properties after Au coating.
- No toxic effects on two different cell types.
- NPs suitable for theranostic applications.