Figure 1From: Cytotoxicity and variant cellular internalization behavior of water-soluble sulfonated nanographene sheets in liver cancer cellsAFM images of the SGSs. Left and right images depict completely exfoliated SGSs of diameter 1.41 ± 0.08 μm and height 1.01 ± 0.02 nm. Larger, more graphitic-like materials of diameters approximately 3 to 5 μm were also present in lower quantities (Additional file1: Figure S1).Back to article page