Figure 6From: One-Pot Reaction and Subsequent Annealing to Synthesis Hollow Spherical Magnetite and Maghemite NanocagesHysteresis loops (A) of Fe3O4nanocages (a) and γ-Fe2O3Nanocages (b); Photographs (B) of the Fe3O4nanocages and γ-Fe2O3nanocages (dispersed in ethanol solution) before and after magnetic separation by an external magnetic field (this magnet takes from the MSS)Back to article page