Figure 5

Influence of pH on oxidization and stability of C24-Ag silver nanodots in presence of 100 μM sodium hypochlorite. The emission intensity of 485 nm decreased at pH = 4 (a) but gradually increased at pH = 7 (b) and pH = 10 (c). The numbers before ‘hrs’ or ‘day’ in the legends indicate the time at which the emission was measured, and those after the ‘em’ indicate the excitation wavelengths.