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Fluorescence microscopy of A431-cells incubated with AuNP-RGD-NIR-dye 8 at same concentrations (50 µg/mL) at 1, 3, 6, and 24 h (from top to bottom). Left row overlays of Sytox Green and 8 are shown. Middle row overlays of Sytox, membrane orange and 8 are shown. Right row overlays of bright field and 8 are shown. The cell nuclei were stained with Sytox Green and the cytoplasma with membrane Orange.
