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. Author manuscript; available in PMC: 2016 Jul 3.
Published in final edited form as: Toxicology. 2015 Mar 20;333:25–36. doi: 10.1016/j.tox.2015.03.008

Fig. 2.

Fig. 2

X-ray photoelectron spectroscopy survey scan spectrum of ND-MWCNT sample (A), high resolution X-ray photoelectron spectroscopy spectra for carbon (B), nitrogen (C), and oxygen elements (D).