Antibacterial Activity of Silver Nanoparticles Produced by Laser

Abstract

Abstract:Q-switched Nd:YAG laser has been employed to prepare colloidal solutions of silver nanoparticles. SEMinvestigations as well as the surface Plasmon of UV-Vis spectra reveal formation of silver nanoparticles. Thosenanoparticles were exhibited antibacterial activity on some bacteria which live in human body. It is found thathigher concentration of silver nanoparticles of 50 µg/ml and small nanoparticles (less than 25 nm) wouldincrease the inhibition zone around the implanted bacteria and reach 15 mm for Proteus. Remarkable incrementof antibiotics when silver nanoparticles added to improve the antimicrobial effect against gram-negative andgram-positive bacteria. It is also found that the most sensitive bacteria for silver nanoparticles was Proteus andthe minimum inhibition concentration of 15 µg/ml was obtained for Staphylococcus