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<p>In this research, nickel nano particles were prepared using pulsed laser ablation in liquid (PLAL) method, where nickel metal was used as a laser radiation source. 5&#xa0;ml of distilled de-ionized water was used as a medium to prepare the samples at different pulse numbers (300, 600, 900). A clear change in the color of the solution from transparent to gradually darker shades was observed with increasing pulse number, indicating the formation of nano particles as a result of their increasing concentration in the solution. The spectral absorption of the prepared solutions was measured using a UV-Vis device, where absorption peaks appeared at a wavelength of 400&#xa0;nm. This absorption is a strong indicator of the formation of metal nano particles. The optical band gap of the prepared particles was calculated, where the values were gradually decreasing with increasing pulse number (4.18, 4.13, 4.06&#xa0;eV). This decrease indicates an increase in the size of the nano particles and a modification in their optical properties due to nano scale effects. X-ray diffraction (XRD) results showed that the nanoparticles consist of two crystalline structures. The metallic phase of nickel (Ni) and the cubic phase of nickel oxide (NiO), these results confirm the formation of a composite material with a regular crystalline structure. From the morphological properties. Scanning electron microscope (FESEM) images revealed that the nano particles take spherical and sub-spherical shapes, the atomic force microscopy (AFM) analyses showed the surface topography and characteristics, showing that the average diameter of the nano particles varies depending on the number of pulses.The research shows that the number of pulses directly affects the physical and optical properties of the nanoparticles.The binary Ni/NiO structure and spherical structure enhance the distinctive properties of these particles.</p>

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Using Laser Ablation To Prepare Nano Nickel And Studying Optical Properties

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Sura R. Mohammed,
  • Alyaa H. Ali

摘要

In this research, nickel nano particles were prepared using pulsed laser ablation in liquid (PLAL) method, where nickel metal was used as a laser radiation source. 5 ml of distilled de-ionized water was used as a medium to prepare the samples at different pulse numbers (300, 600, 900). A clear change in the color of the solution from transparent to gradually darker shades was observed with increasing pulse number, indicating the formation of nano particles as a result of their increasing concentration in the solution. The spectral absorption of the prepared solutions was measured using a UV-Vis device, where absorption peaks appeared at a wavelength of 400 nm. This absorption is a strong indicator of the formation of metal nano particles. The optical band gap of the prepared particles was calculated, where the values were gradually decreasing with increasing pulse number (4.18, 4.13, 4.06 eV). This decrease indicates an increase in the size of the nano particles and a modification in their optical properties due to nano scale effects. X-ray diffraction (XRD) results showed that the nanoparticles consist of two crystalline structures. The metallic phase of nickel (Ni) and the cubic phase of nickel oxide (NiO), these results confirm the formation of a composite material with a regular crystalline structure. From the morphological properties. Scanning electron microscope (FESEM) images revealed that the nano particles take spherical and sub-spherical shapes, the atomic force microscopy (AFM) analyses showed the surface topography and characteristics, showing that the average diameter of the nano particles varies depending on the number of pulses.The research shows that the number of pulses directly affects the physical and optical properties of the nanoparticles.The binary Ni/NiO structure and spherical structure enhance the distinctive properties of these particles.