Multicore Assemblies Potentiate Magnetic Properties of Biomagnetic Nanoparticles

Biocompatible magnetic nanoparticles (MNPs) that are both stable and amenable to chemical modification with targeting ligands continue to emerge as important materials in biomedical research.[1–5] MNPs provide an efficient contrast mechanism for biological targets; as most biological samples have intrinsically low magnetic susceptibility, only MNP-labeled objects will respond to external magnetic stimuli. Such properties have led to the widespread use of MNPs, for example, in cell sorting and bioseparation,[6, 7] medical diagnosis,[8–10] imaging,[11–14] and therapeutics.[15, 16]