“…Many different methods for the synthesis of magnetite nanoparticles have been described in the literature, including co-precipitation [ 27 , 28 , 29 ], hydrothermal [ 30 , 31 , 32 ], sol-gel [ 33 , 34 , 35 ], thermal decomposition [ 36 , 37 , 38 , 39 , 40 ], among others [ 41 , 42 , 43 ]. Besides, the key role of the synthesis conditions, such as reaction temperature, reagents concentration, the effect of different additives, and others on the magnetic properties and size control have also been discussed in the literature.…”