Fig. 9
From: Uptake of label-free graphene oxide by Caco-2 cells is dependent on the cell differentiation status
GRM association with differentiated Caco-2. a Differentiated Caco-2 cells grown on cell culture inserts (PET membrane). a1 After exposure to GO1, GO3 or control medium for 24 h; a2 after exchange of supernatant (S0) by phenol-red free cell culture medium; b absorbance spectra of original GO dispersions (40 µg/ml GO) and control medium, as well as of cell culture supernatants after 24 h cell exposure (S0), after one washing step (S1) and two washing steps (S2). c Obtained cell pellets of differentiated Caco-2 cells after exposure to GO after two washing steps. No evidence for cell-associated GO given