Comparison between the gold nanoparticles prepared by chemically and laser ablation method

Abstract

Noble metal gold nanoparticles were prepared by tow method. The first method gold nanoparticles (AuNPS) synthesised by the reduction of chloroauric acid ( HAuCl4) with a solution for sodium borohydride. The second method the gold mineral plates were ablation by pulsed laser when it was immersed in filtered H2O. The synthesized nanoparticles are characterized by using UV–Visible absorption spectroscopy, X-ray diffraction and transmission electron microscopy (TEM).The Ultraviolet-Visible absorption spectra in the visible regions of the gold nanoparticles appear intense absorptions a result of surface plasmon resonance (spr) vibrations in noble mineral nanoparticles. From X-ray diffraction and TEM tests the particle size for the laser ablation method calculated was found to be lie between (15- 20 nm) and for chemical method approximately lie between (13-16 nm).