Fig. 5
From: Uptake of label-free graphene oxide by Caco-2 cells is dependent on the cell differentiation status
Cell-associated GRM. a Undifferentiated Caco-2 cells exposed to GRM for 24 h show GRM-concentration dependent increase in absorbance (absorbance corrected for intrinsic cell absorbance; n = 4 for GNP, n = 6 for GO1 and GO3); b images of Caco-2 cell pellets in phenol-red containing cell culture medium including all supplements after exposure to 40 µg GRM/ml for 24 h in comparison to unexposed control cells; c flow cytometric analysis (n = 3) shows concentration-dependent increase in % of cells associated with GO1 and GNP. Exposure to GO3 did not lead to a significant increase in the % of cells with cell granularity above the control cells