Polyethylene glycol peg 400

The manganese ferrite nanoparticles were prepared from the following ingredients: manganese (II) nitrate tetrahydrate / Mn(NO₃)₂ ∙ 4 H₂O (Carl Roth GmbH, Karlsruhe, Germany), iron (III) nitrate nonahydrate / Fe(NO₃)₃ ∙ 9 H₂O (VWR International, Leuven, Belgium), and polyethylene glycol (PEG 400, [MW = 400 g/mol]) from VWR International (Fontenay-sous-Bois, France) and they were used as a reducing agent and dispersion media for the metal precursors.
For the maintenance of bacterial cell cultures and isolation of plasmid DNA with MnFe₂O₄ nanoparticles the following chemicals were used: tryptone, yeast extract (Neogen Culture Media, Lansing, MI, USA), sodium chloride, bacteriological agar, polyethylene glycol (VWR International, Leuven, Belgium), ampicillin sodium salt (Alfa Aesar, Kandel, Germany), a plasmid purification midi kit (Qiagen, Hilden, Germany), tris hydrochloride salt, bromophenol blue sodium salt (VWR International, Solon, OH, USA), ethylenediaminetetraacetic acid disodium salt dihydrate (Sigma-Aldrich, Louis, MO, USA), 96% ethanol (VWR International, Fontenay-sous-Bois, France), Tween 20, Gel Red nucleic acid gel stain, agarose (Merck Millipore, Billerica, MA, USA), and a 1 kb DNA ladder (New England Biolabs, Ipswich, MA, USA and Thermo Fisher Scientific, Waltham, MA, USA).