Fig. 9. Cell viabilities of HepG2 (A) and SMMC-7721 (C) cells treated with different concentrations of GNR@PPy@Fe₃O₄ and GNR@PPy@Fe₃O₄-FA nanocomposites. Viabilities of HepG2 (B) and SMMC-7721 (D) cells after incubation with different concentrations of GNR@PPy@Fe₃O₄-FA and GNR@PPy@Fe₃O₄-DOX-FA nanocomposites with or without 808 nm laser irradiation. The p values were calculated using multiple t tests (*p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001).