Successive ionic layer deposition of Fe$_3$O$_4$@H$_x$MoO$_4\cdot n$H$_2$O composite nanolayers and their superparamagnetic properties

The Fe$_3$O$_4$@H$_x$MoO$_4\cdot n$H$_2$O nanolayers were synthesized on the solid surface for the first time by Successive Ionic Layer Deposition (SILD) method with using an aqueous Fe$_3$O$_4$ suspensions and (NH$_4$)$_2$MoO$_4$ solutions. The obtained nanolayers were investigated by XRD, SEM, EDX, FTIR spectroscopy and magnetization measurement techniques. SEM images showed that the nanolayers formed by nanoparticles of size approximately 15–20 nm. The synthesized nanolayers exhibited superparamagnetic properties with the saturation magnetization value of 55 emu/g.