(a) The kinetics of AgNWs dissolution following incubation of the Ag NWs in DI-water, RPMI-1640, DMEM and DCCM-1 at 37 °C. The solubilized silver concentrations were measured by ICP-OES from 1 h up to 168 h. (b) ICP-OES analysis of solubilized silver concentrations of 17.0 µg/mL AgNO3 (equal to an Ag concentration of 10 µg/mL) in DI-water, RPMI-1640, DMEM and DCCM-1 solutions, incubated at 37 °C for 0.5 h (n = 3).