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. 2021 Sep 29;4:139. doi: 10.1038/s42004-021-00568-1

Fig. 5. Microscopic analysis of the surface.

Fig. 5

SEM images obtained for SFMO a before and b after CH4 treatment indicating marked differences in particle agglomeration. c, d EDX elemental quantification  for SFMO before and after CH4 treatment, respectively, showing an increase in carbon content from 15 to 84 At%.