Gold-silver (Au-Ag) core-shell nanocomposites were successfully synthesized via pulsed laser ablation (PLA). Similarly, graphene oxide (GO) nanosheets were prepared from graphite in pure distilled water via (PLA) technique. GO nanosheets were decorated with (Au-Ag) core-shell by mixing 10 ml of (Au-Ag) with 20 ml of GO. The loading of the core-shell and the morphology of (Au-Ag) on the GO were examined using Transmission Electron Microscopy (TEM) which showed that the (Au-Ag) core-shell was decorated on a GO sheet. Electron Diffraction X-ray (EDX) was used to determine the percentage of the decoration in the prepared samples. The GO sheets and deposition of (Au-Ag) core-shell on GO were also analyzed using UV-visible absorption spectra. These results revealed that (Au-Ag) @GO has all the characterization peaks of the GO and (Au-Ag) core-shell. Using the optical absorption spectra, the absorption coefficient (α), refractive index (n), and optical conductivity (σ opt) were calculated for the prepared samples, which increased by adding (Au-Ag) to the GO sheet. The optical properties of (Au-Ag) @GO make it an excellent candidate for photonic applications. |
