In this experimental study, the laser assisted reduction in solution (LARIS) method is introduced. This method can be used for synthesis of gold nanoparticles from reduction of HAuCl 4 during ablation of typical targets. To do this, G are produced by simultaneously adding the HAuCl 4 solution to the environment of molybdenum sheet (typical target) laser ablation. Also, the studied parameters affecting the synthesis procedure are include HAuCl 4 solution concentration, time of laser ablation, chemical additives (CTAB KI) and different targets. The Au nanoparticle formation is tracked by its LSPR properties during LARIS procedure. The optical absorption spectra, morphology and structural properties are studied by UV-Visible, XRD, TEM and SAED analysis method, respectively. According to analysis, the LARIS process leads to the formation of G with average size less 10 nm, however, the concentration of the HAuCl 4 solution and laser ablation time affects the size distribution and partly the morphology of the nanoparticles. The results of UV-Visible spectroscopy and TEM images related to chemical additives show that the morphology is tending to ellipsoid-shape particles. For more clarification, the reduction mechanism is discussed during LARIS method. The results show that G formation during LARIS method has optimized performance when compared with laser ablation method.
