Figure 3

Cell viability following a 24 h exposure to functionalized Ag and Au NPs of A549 cells (A, B; means ± SEM of n = 6), BEAS-2B cells (C, D; means ± SEM of n = 3) and NHBE cells (E, F; means ± SEM of n = 3). P-values * < 0.05, *** < 0.005, **** < 0.001. Cells treated with medium only were used as control (100%).