Figure 1

Scanning electron microscopy images of the test materials. A-D: agglomerate scale, E-H: primary structure scale. A, E: MWCNT, B, F: graphene, C, G: graphite nanoplatelets, D, H: Carbon Black. Note the same scale for MWCNT and Carbon Black, and slightly different set of scales for graphite nanoplatelets and graphene, in order to point to their individual characteristics.