Fig. 6

The biocompatibility and the therapeutic efficacy of single photothermal therapy or combined photothermal-chemotherapy. a Cell viability of Hela cells cultured with rGO@Fe₃O₄ for 24 h and 48 h. b Cell viability of Hela cells cultured with or without NIR irradiation at different concentrations of rGO@Fe₃O₄ for 24 h and 48 h. (c, d) Cell viability of Hela cells cultured with free DOX, rGO@Fe₃O₄/DOX microspheres for 24 h and 48 h with and without NIR irradiation (808 nm, 2 W cm⁻²) (*p < 0.05, **p < 0.01, ***p < 0.001)