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Publication Metadata only Biomagnetic of Apatite-Coated Cobalt Ferrite: A Core–Shell Particle for Protein Adsorption and pH-Controlled Release.(2011) I-Ming Tang; Nateetip Krishnamra; Narattaphol Charoenphandhu; Rassmidara Hoonsawat; Pon-On, W.; Mahidol University. Mahidol University International College. Science Division.Magnetic nanoparticle composite with a cobalt ferrite (CoFe 2O 4, (CF)) core and an apatite (Ap) coating was synthesized using a biomineralization process in which a modified simulated body fluid (1.5SBF) solution is the source of the calcium... phosphate for the apatite formation. The core-shell structure formed after the citric acid-stabilized cobalt ferrite (CFCA) particles were incubated in the 1.5 SBF solution for 1 week. The mean particle size of CFCA-Ap is about 750 nm. A saturation