The current research describes the installation of Ag nanoparticles composite with PS:Au particles and absorption properties by chemical methods for diverse cases. The synthesis was made in two technique, in the first, PS nanoparticles were coated with Au. The second step involved the production of PScoated Au- Ag particles by variation the amount of Ag. The result shows that variation of the quantities of Ag led to absorption convert in the same reaction time, with fixing the amount of NaoH, the absorbance properties changed. On the other way, absorbance increased and small peaks appears with augmentation in Ag amount

Keywords : Nanoparticles, Composite (PS: Au)/Ag, Absorption, Nanoshell, Plasmon.