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. 2019 Jul 12;8(7):915–921. doi: 10.1002/open.201900126

Figure 4.

Figure 4

Results of XPS analysis of the MWCNTs‐COOH and Man‐MWCNTs: (a) XPS survey scan spectra of MWCNTs‐COOH and Man‐MWCNTs. The inset is magnification of the N1s region in MWCNTs‐COOH and Man‐MWCNTs spectrum. (b,c) High resolution fitted XPS C1s spectra of MWCNTs‐COOH and Man‐MWCNTs. (d,e) High resolution fitted XPS O1s spectra of MWCNTs‐COOH and Man‐MWCNTs. (f) High resolution fitted XPS N1s spectra of Man‐MWCNTs.