highly significantp < 0.001
6B that the fluorescence intensity in the SMMC-7721 cells (155.66 ± 7.06) and HepG2 cells (41.58 ± 3.19) was higher than that of L02 cells (0.001 ± 0.0) incubated with FA-PEG-QDs for 2 h and there was a highly significant difference ( p < 0.001) in fluorescence intensity between L02 cells and the hepatocarcinoma cells (HepG2 and SMMC-7721), confirming that FA-PEG-QDs can target more easily cancer cells than normal cells.