  Here we present a simple physical method to produce magnetic nanodiamonds
(NDs) using high dose Fe ion-implantation. The Fe atoms are distributed inside
the NDs without affecting their crystal structure. So the NDs can be still
functionalized through surface modification for targeted chemotherapy and the
added magnetic property will make the NDs suitable for localized thermal
treatment for cancer cells without the toxicity from the Fe atoms being
directly in contact with the living tissue.
