Fig. 3From: Electric Field-Assisted In Situ Precise Deposition of Electrospun γ-Fe2O3/Polyurethane Nanofibers for Magnetic HyperthermiaSEM images of pure PU fiber membranes prepared a, e without and b, f with the use of an auxiliary electrode. γ-Fe2O3/PU composite fiber membranes prepared c, g without and d, h with the use of an auxiliary electrode (the insets show the diameter distributions of the electrospun fiber membranes)Back to article page