Cobalt 2 nitrate hexahydrate

For the synthesis of the magnetic ferrite-based nanoparticles, nickel(II) nitrate hexahydrate, Ni(NO₃)₂∙6H₂O, MW: 290.8 g/mol (ThermoFisher GmbH, 76870 Kandel, Germany); cobalt(II) nitrate hexahydrate, Co(NO₃)₂∙6H₂O, MW: 291.0 g/mol; and iron(III) nitrate nonahydrate, Fe(NO₃)₃∙9H₂O, MW: 404.0 g/mol from the VWR Int. LtD. (B-3001 Leuven, Belgium) were used. Polyethylene glycol (PEG 400, Mw: ~400 Da, which corresponds to a chain length of approximately 8–9 links) from VWR Int. Ltd. (F-94126 Fontenay-sous-Bois, France) was used as the reducing agent and dispersion medium of the metal precursors. Acetonitrile, ammonium hydroxide, acetic acid, formic acid, picoline borane, procainamide and human serum were purchased from Sigma-Aldrich (St. Louis, MO, USA). PNGase F was purchased from New England Biolabs (Ipswich, MA, USA).

Formic acid, ammonium-hydroxide, acetic acid, acetonitrile, picoline borane, procainamide-hydrochloride, dimethyl sulfoxide, magnesium(II) nitrate hexahydrate and ethanolamine were purchased from Sigma-Aldrich (St. Louis, MO, USA). PNGase F was obtained from New England Biolabs (Ipswich, MA, USA). Nickel(II) nitrate hexahydrate and sodium acetate were obtained from Thermo Fisher Scientific (Kandel, Germany). Mangan(II) nitrate tetrahydrate was provided by Carl Roth (Karlsruhe, Germany). Cobalt(II) nitrate hexahydrate and iron(III) nitrate nonahydrate were purchased from VWR International (Leuven, Belgium).