Preparation of Copper Oxide Nanoparticles Using Pulsed Laser Ablation Method in Liquid at Different Energies and Study of Their Structural and Optical Properties
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Abstract
In this study, copper oxide nanoparticles (CuO NPs) were prepared and characterized with the pulsed laser ablation in liquid (PLAL) technique using a wavelength (532 nm) of Nd: YAG laser, with different energies (100, 150, and 200 mJ) for ablation of the mineral copper target. Colloidal NPs have been characterized using the field-emission scanning electron microscope (FESEM), UV-Vis technique, and X-ray diffraction (XRD). The resulting colloidal CuO NP solutions were green. FESEM images showed that most of the NPs obtained across all laser energies have individualized needle shapes with sizes below 100 nm. Furthermore, samples prepared in deionized water showed average diameters of 22.153, 25.79, and 20.664 nm for CuO NPs. Results of XRD showed that CuO NPs showed a mono-inclined crystal structure. The visible UV spectrometry confirmed that the absorption values of CuO NPs increased as the laser effect increased, with the energy gap decreasing by (2.6 – 2.53 eV).
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