Fig. 3From: Iron Oxide Nanoparticles: Multiwall Carbon Nanotube Composite Materials for Batch or Chromatographic Biomolecule SeparationXP spectra in the range of C 1s of cCNTs (a) and cCNT-SPIONs (b). The spectra are fitted with a combination of Gaussian and Lorentzian functions with the program OriginBack to article page