Fig. 3From: RETRACTED ARTICLE: A Comparative Study of the Toxicity of Polyethylene Glycol–Coated Cobalt Ferrite Nanospheres and NanoparticlesSEM of cobalt ferrite nanoparticles (a) and nanospheres (b). TEM images of PEG-coated cobalt ferrite nanoparticles (c) and nanospheres (d), collected at different resolutionsBack to article page