Figure 2.

a) Emission spectra of QDs@TA NCs treated with different concentrations of ATP. Inset: images of various samples under 365 nm light irradiation. b) Time evolution of the fluorescence intensity of QDs@TA NCs in PBS (control) and 20 × 10⁻³ m ATP, respectively. c) Time evolution of cellular uptake after incubating the HepG2 cells with QDs@TA‐PEG (100 µg mL⁻¹) for various time periods. d) Confocal images of HepG2 cells after treating with QDs@TA‐PEG for different time periods (0, 6, and 12 h). (+): with apyrase treatment. Images were acquired using an exication laser of 408 nm and emission range from 570–1000 nm.