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. 2017 Jul 5;7:4675. doi: 10.1038/s41598-017-04143-4

Figure 5.

Figure 5

SEM images of (a) Graphite oxide, (b) synthesized sulfonated graphene oxide, (c) shows the SEM image of a huge area of dispersed powder of rGOPhSO3H on the silicon wafer for elemental analysis. (d) and (e) denote the resultant EDS elemental mapping of C and S of the region which shown in (e). (f 1 and f 2) displays the EDS elemental analysis of graphite oxide and sulfonated graphene oxide.