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<p>A&#xa0;spectroscopic study of TiO<sub>2</sub> plasma produced by a&#xa0;500 mJ Nd:YAG laser is performed. Optical emission spectroscopy (OES) is used to obtain important information on the electron temperature and density. The Stark expansion method is used to calculate the electron density, which is found to be 6.44⋅10<sup>17</sup> electrons/cm<sup>3</sup>, while the Boltzmann diagram method is used to calculate the electron temperature, which is 1.926 eV. Nanoparticles are prepared by pulsed laser ablation in liquid (PLAL) and examined using XRD and FE-SEM techniques, which revealing that the resulting nanoparticles have an average diameter of 35 nm. The absorbance test of the prepared sample shows the maximum wavelength of 373 nm, and the biological effectiveness of these particles is tested against two types of bacteria <i>(E.&#xa0;coli </i>and <i>S.&#xa0;aureus)</i> using four different concentrations, where the samples show promising results due to their nanoscale properties and high stability proven by the Zeta potential test.</p>

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Laser-induced TiO2 plasma characterization and antibacterial efficacy of nanoparticles produced by pulsed laser ablation

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • Huda O. Saheb,
  • Haidar K. Dhayef,
  • Mohammed H. Jawad,
  • Zahraa T. Turki,
  • Rajaa Obayes Abdulsada

摘要

A spectroscopic study of TiO2 plasma produced by a 500 mJ Nd:YAG laser is performed. Optical emission spectroscopy (OES) is used to obtain important information on the electron temperature and density. The Stark expansion method is used to calculate the electron density, which is found to be 6.44⋅1017 electrons/cm3, while the Boltzmann diagram method is used to calculate the electron temperature, which is 1.926 eV. Nanoparticles are prepared by pulsed laser ablation in liquid (PLAL) and examined using XRD and FE-SEM techniques, which revealing that the resulting nanoparticles have an average diameter of 35 nm. The absorbance test of the prepared sample shows the maximum wavelength of 373 nm, and the biological effectiveness of these particles is tested against two types of bacteria (E. coli and S. aureus) using four different concentrations, where the samples show promising results due to their nanoscale properties and high stability proven by the Zeta potential test.