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Cellular uptake of CPC/rGO. U87 cells were treated with PC/rGO or CPC/rGO (with or without CPE30 pretreatment). After treatment for 1 h, the fluorescence of Ce6 was measured by confocal microscopy (scale bar indicates 20 μm). Representative flow cytometry data are presented (B), and the fluorescence-positive cell populations were quantified (C). Results are reported as the mean±SD of three independent experiments.
