Fig. 2

Stability of pristine silver nanoparticles and graphene oxide-silver nanocomposites in cell culture media. a Photographs of nanomaterials dispersed in DI water, RPMI, and RPMI + 10 % FBS over 48 h of incubation. Black arrows indicate precipitation of nanomaterials. b Concentration of silver present in the supernatant of centrifuged pristine silver nanoparticles and graphene oxide-silver nanocomposite previously dispersed in DI water and cell media. Initial concentration of Ag = 80 µg mL⁻¹