Fig. 3From: Preparation of Ultrahigh Molecular Weight Polyethylene/Graphene Nanocomposite In situ Polymerization via Spherical and Sandwich Structure Graphene/Sio2 SupportSEM images for a, c RGO-SiO2 spherical supports in different magnification. b Histograms of size distribution of a. d Surface magnification of c. e A broken sphere. f Magnification of eBack to article page