Fig. 10
From: Progress in Iron Oxides Based Nanostructures for Applications in Energy Storage
Reprinted with Permission from [130]. Copyright, Wiley–VCH
a SEM images of the Fe3O4 nanospheres synthesized with ethylenediamine (EDA). The inset of (a) shows a SEM image with higher magnification. (Reprinted with Permission from [129]. Copyright, American Chemical Society.). Physicochemical characterization of the octahedral Fe3O4 nanoparticles. b SEM image showing the octahedral geometry of the iron oxide nanoparticles.