(A) Viability of triple-negative breast cancer cells treated polymer (360 µg/mL), FeCl3 (360 µg/mL), DFO (990 µg/mL), FeCl3 (360 µg/mL) with DFO (990 µg/mL), NCPs (360 µg/mL), and NCPs (360 µg/mL) with DFO (990 µg/mL). (B) Viability of breast cancer cells treated with Cur@NCPs at different concentrations, at DFO/Fe3+ molar ratios of 0, 1, and 1.5. **p<0.01, ***p<0.001, #no statistical significance (p>0.05).