Figure 1

Kinetics of biosynthesis of silver nanoparticles (a) Synthesis of nanoparticles in C. reinhardtii cell free extracts (in vitro) system and (b) in vivo condition. The color of the C. reinhardtii cell becomes yellowish brown after incubation with 1 mM AgNO3 in 5 hours (inset). (c) ICP-MS quantification of remaining Ag+ (in ppm) after removal of in vivo biosynthesized SNPs.