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. 2016 May 14;21(5):617. doi: 10.3390/molecules21050617

Figure 3.

Figure 3

(a) Photographs of MWNT (left) and MWNT-IL (right) suspensions in DI water after 24 h standing; (b) XPS survey spectra of MWNTs and MWNTs-IL composite (inset: the N 1s count of different materials).