Fig. 6
a Temperature elevation of water, free ICG and ICG–BSA NC at a concentration of 200 µg/ml (counted by ICG content) under an 808 nm laser irradiation (1 W/cm2). b The cytoviability evaluation of 4T1 cells under different treatments. In the groups with light irradiation, cells were exposed to an 808 nm laser irradiation for 10 min at 1 W/cm2. Data are expressed as mean ± S.D. (n = 3 in each concentration)