Fig. 5. (a) The cell viability of HeLa cells incubated with the DPPCN-Fc NPs at different concentrations and times in dark conditions. (b) The cell viability of HeLa cells incubated with the DPPCN-Fc NPs without and with irradiation by a 730 nm laser (1.0 W cm^–2, 3 min). (c) Confocal microscopy images of the HeLa cells incubated with the DPPCN-Fc NPs (80 μg mL^–1) for 6 hours. The red and blue colours represent the fluorescence (excited at 488 nm) of the DPPCN-Fc NPs and DAPI images, respectively.