CdSe/ZnS quantum dots induce photodynamic effects and cytotoxicity in pancreatic cancer cells

Figure 2 Cell viability of SW1990 cells was inhibited by CdSe/ZnS quantum dots with or without illumination. A: SW1990 cells were treated with various concentrations of CdSe/ZnS QDs (0, 0.5, 1.0, 1.5, 2.0, 2.5 μmol/L); incubation time was 3 h; light dose was 20 J/cm²; B: SW1990 cells incubated with CdSe/ZnS QDs (1.5 μmol/L) for 0, 1, 3, 6 and 12 h and illuminated (light dose was 20 J/cm²); C: SW1990 cells alone or incubated with CdSe/ZnS QDs (1.5 μmol/L) for 3 h and illuminated with different light doses (0, 10, 20 and 30 J/cm²). ^bP < 0.01 vs related group without light. QDs: Quantum dots.