“…In particular, magnetite (Fe O ) and maghemite ( -Fe O ) are two main crystal phases, commonly used in various applications. The most common examples are magnetic resonance imaging [ 5 , 6 , 7 ], magnetic hyperthermia [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ], drug delivery/release systems [ 16 , 17 , 18 ], immune response control [ 19 , 20 ], and environmental remediation [ 21 , 22 ]. There are several methods of preparing iron oxide nanoparticles [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], but their aqueous suspensions are often not stable and agglomerate quickly.…”