Optical properties of laser ablated copper oxide nanoparticles

Copper oxide (Cu(2)O) nanoparticles were generated by second harmonic (λ=532 nm) of pulsed nanosecond Nd:YAG laser. The ablation was performed of a copper target in water and 0.2 M sodium dodecyl sulfate (SDS) aqueous solution. Optical properties of nanoparticles have been characterized by ultraviolet-visible absorption and photoluminescence emission spectra. We observed the absorption peaks for the nanoparticles in water at 266 nm and for the nanoparticles in 0.2 M SDS at 297 and 709 nm. There are two peaks in the photoluminescence emission spectra of nanoparticles at 365 and 450nm. The calculated band gaps of nanoparticles at 2 and 2.3 eV indicate the production of Cu(2)O nanoparticles. Size and agglomeration of produced nanoparticles analyzed by dynamic light scattering. According to the results by adding SDS, smaller nanoparticles with less agglomeration produced. This confirms the capping protection role of SDS against aggregate.

کلیدواژه ها:

Copper oxide nanoparticles ، Laser ablation ، Optical properties