Figure 2

Superoxide ions generation. O2-· anions generation by T-Lite DA, T-Lite DL, and pure TiO₂ nanoparticles measured using the XTT combined or not with the SOD chemical probes. Measurements were performed at 470 nm. Error bars indicate the standard deviation from the mean (n = 3). XTT formazan production = [Abs sample(t)-Abs sample(t0)]-[Abs solvent(t)-Abs solvent(t0)].