<p>Viability of MCF-7 cells which were assessed A: after 24 h, 48 h, and 72 h of incubation with different concentrations of SF-loaded FITC/FA@[Fe<sub>3</sub>O<sub>4</sub>@Au] NPs. B: at different concentrations of incubation with free SF, FITC/FA@[Fe<sub>3</sub>O<sub>4</sub>@Au] NPs, SF-loaded FITC@[Fe<sub>3</sub>O<sub>4</sub>@Au] NPs, and SF-loaded FITC/FA@[Fe<sub>3</sub>O<sub>4</sub>@Au] NPs. Data are presented as the mean ± standard deviation of replicates.</p
