Figure 2

Digital images taken during the performance of the intracellular measurements, a and b show the fluorescence images of the bare and the PPDME-conjugated ZnO NRs, respectively. c Image of the PPDME-conjugated ZnO NRs tip inside the cancer cell. d Image of the conjugated ZnO NRs tip near the cancer cell. e Image of the conjugated ZnO NRs tip inside the cancer cell. In f and g magnified images of the cancer cell. h Shows the cancer cell under necrosis with intracellular penetration of the conjugated ZnO NRs tip. Finally in i conjugated ZnO NRs tip after cancer cell necrosis