Abstract
Iron oxide (Fe3O4) nanoparticles are synthesized using the chemical co-precipitation method. Changing factors such as surfactant, pH, and molar ratio of ferrous to ferric ions effects the size and magnetic properties of the nanoparticles significantly. The synthesized nanoparticles are characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Fourier transform infrared spectroscopy (FTIR). The nanoparticles have inverse spinel structure. Superparamagnetic behavior is detectable for all samples. The variations of magnetic properties for different sized Fe3O4 nanoparticles can be explained with surface effects and finite size effects.
Graphical Abstract
![](/cms/asset/c1648a70-b347-435e-8ec9-59a1c523b1f6/gcoo_a_1849639_uf0001_c.jpg)
Disclosure statement
No potential conflict of interest was reported by the author.