Fig. 2From: RETRACTED ARTICLE: A Comparative Study of the Toxicity of Polyethylene Glycol–Coated Cobalt Ferrite Nanospheres and Nanoparticlesa XRD results of the cobalt ferrite. b Fourier transform infrared (FTIR) spectroscopy employed in the range 500–4000 cm−1. c Room temperature Raman spectrum of the samples collected in 190–1000 cm−1 frequency range. d Thermogravimetric analysis (TGA) of PEG-coated CoFe2O4 collected in the temperature range 50–400 °CBack to article page