Production of Ultrafine Ag Nanoparticles by Laser Ablation in Diluted Sodium Borohydride Solution and Their Antibacterial Properties

Until now, using laser ablation in liquid could only produce Ag nanoparticles with sizes stretching to 20 nm and an average size greater than 7 nm. In this paper, we report a special laser-based method for the production of ultrafine silver nanoparticles with an average size of 5 ± 2.4 nm and maximum nanoparticles up to 10 nm in size by using laser ablation a silver plate immersed in diluted sodium borohydride. A diode pumped Nd:YAG laser emitting at the second harmonic (532 nm) wavelength with a pulse duration of 7 ns was used to generate the Ag nanoparticles.