Effect of laser wavelengths on the silver nanoparticles size prepared by PLAL

Abstract EN

In this present study, Pulsed Laser Ablation in Liquid (PLAL) experiment setup for synthesis colloidal solution of silver-NPs.

The laser system was used in this study, a (Nd- YAG) nanosecond laser system with optimal pulse duration of 10 ns and repetition rate 1-6 Hz.

The Laser wavelengths were : 1064 nm, 532 nm and 355 nm.

The spot size of the laser beam on the surface of metal plate was varied in the range of 1.4-1.5 mm in diameter by changing the distance between the focusing lens and the metal plate.

The ablation process was typically done for 1 minute.

The average particle size has been characterized by TEM, SEM and UV-Vis investigation.

From morphology results for colloidal silver nanoparticles images were spherical shape and average size of the particles is 55-60 nm at wavelength (λ = 1064 nm), average size of the particles is 35-40 nm at (λ =532 nm) and average size of the particles is 28 nm at (λ = 355 nm).