Fig. 3From: Fabrication of Fe3O4@mSiO2 Core-Shell Composite Nanoparticles for Drug Delivery ApplicationsTypical TEM images of the a–c SG-1, d–f SG-2, and g–i SG-3 samples, showing the formation of Fe3O4@mSiO2 core-shell structures with shell thickness 15, 25, and 40 nm, respectivelyBack to article page