Biogenic synthesis of antimicrobial silver nanoparticles capped with l-cysteine

- Surnatant of E. coli culture was used to synthesis silver nanoparticles.
- l-Cysteine was used as capping agent.
- The ration l-cysteine to AgNO3 affected the nanoparticles size.
- The silver nanoparticles synthesised had antimicrobial activity against E. coli and S. aureus.