Research Article
Microbial-Physical Synthesis of Fe and Fe3O4 Magnetic Nanoparticles Using Aspergillus niger YESM1 and Supercritical Condition of Ethanol
Figure 10
(a) Magnetization dependence on external magnetic field at room temperature for Fe3O4 nanoparticles. (b) Determination of magnetic domain size from the initial slope of curve.