Synthesis, characterization and some optical properties of silver nanoparticles prepared by pulsed Laser ablation technique

Abstract

The  aim of  the  research is to prepare  silver  nanoparticles  by   laser ablation method in an aqueous medium to dements  rate the important  of laser in the  production of  silver nanoparticles ,  AgNPS  prepared were distinguished by their structural , physical and optical properties . so we studied  the  properties of these  nanoparticles  prepared in this way . some  optical  examinations  were   performed  on the  colloidal  silver solution  , the structural properties were characterized by using  X-Ray  diffraction , the physical properties  were  analyzed by  Field  Emission  Scanning  Electron  Microscopy( FESEM ) and the optical Properties   were  analyzed by  UV-Visible  spectroscopy ,  and  FTIR measurement in order to identify the   dimensions  , and  shapes of the prepared AgNPS .and used Energy - Dispersive X- Ray Spectroscopy ( EDX ) , Fluorescence Spectrum  measurement , these  particles were prepared by means of a liquid-pulsed laser ablation technique (PLAL) using  Nd:YAG  laser with an energy of ( 500 ) mj . And  a number 0f (100 ) pulses . this method is simple , pollution , free , stable , and has the ability to determine  the  specifications  of the  prepared  particles. when examining the size and shape of the nanoparticles  it was found that the nanoparticles are spherical shape , which dimensions  ranging (46.55- 34.80)  nm .The optical  properties  were  also studied by UV-Visible spectroscopy ,the results showed that the absorption  spectrum of silver was  located  at ( 534 ) nm . the  height  and  decrease of   the absorption peaks depend on the  concentration of silver  nanoparticles in the colloidal  solution , as well as  the shape of  those particles . the results of  X-Ray diffraction examination  showed  that the film of the prepared  AgNps  at energy ( 500 )  mj is polycrystalline  and of cubic type .