graphene based copper nanoparticles synthesis by pulsed laser ablation

In this paper, graphene nanoparticles, copper oxide nanoparticles and cu-graphene core-shell have been produced by means of a pulse laser ablation process (pla) in deionized water solution.  the composition ratio of materials has been investigated in the structure of the prepared materials and their optical properties. the absorption of the samples was obtained by the uv detective device in the wavelength range of 290 to 800 nm. the most and the least absorbance belongs to copper oxide and graphene respectively. also, the energy band gap of the samples has been calculated using tauc relation in which the least and the most band gap energy are shown for graphene and copper oxide respectively. structure of the samples was studied using tem image. in graphene and copper oxide compositions, the copper-graphene core-shell structure is shown obviously. in addition, the nonlinear optical properties of copper oxide based on graphene have been studied by z-scan technique.