Figure 2
From: Author Correction: Graphene oxide and its derivatives as promising In-vitro bio-imaging platforms

Emission patterns of (a) GO, (b) GO-PEG, (c) GO-PEG-Fe3O4, (d) GO-PEG-Au, and (e) GO-PEG-FA at the excitation wavelength of 350 nm in water, cell media (DMEM), and PBS at two different pH values (pH 6.6 and 7.4).