Deposition of MgO Nanoparticles by Laser Pyrolysis


  • Hala Mahmood Abdulwaahb Al-Nahrain University, Baghdad
  • Bassam G. Rasheed College of Engineering, Al-Nahrain University
  • Hanadi H. Altawil Mathematics, Computer & Natural Sciences Division of Ohio Dominican University, USA



MgO Nanoparticles, Laser Pyrolysis, Nanoparticles Deposition


Magnesium oxide nanoparticles were deposited by laser pyrolysis process. Three types of lasers were employed CW CO2, Q-switched Nd-YAG (short pulses) and long pulses Nd-YAG lasers. The size and density of nanoparticles vary with laser energy, power, pulse duration and the scanning speed of the laser. In this method, MgO nanoparticles were deposited by a laser beam on a quartz substrate from aqueous solution of magnesium nitrate. AFM images reveal formation of small nanoparticle size of 24.5 nm with surface roughness 6.97nm by Q-switched Nd-YAG laser (10 ns) when the energy was 1J. While for CO2 laser, the smallest size was 18.8 nm at 0.4mm/s scanning speed with surface roughness 5.21nm at the same scanning speed. Moreover, long Nd-YAG pulses laser produces relatively larger average size of 37.5nm at 0.8ms pulse duration. The absorption spectra from UV-Visible spectroscopy were also conducted. The best absorption intensity was obtained at a wavelength ranging between 420-430 nm for both lasers. Finally, Thermal analysis using COMSOL Multiphysics software for the deposition process reveals that maximum temperature about 440Kfor Q-Switched Nd-YAG laser at 1J laser energy. While for RF CO2 laser, the maximum temperature obtained at 0.4mm/s scanning speed is 850K.This work provides a good knowledge for the deposition of nanoparticles using laser beams.


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How to Cite

Abdulwaahb, H. M., Rasheed, B. G., & Altawil, H. H. (2022). Deposition of MgO Nanoparticles by Laser Pyrolysis. Al-Nahrain Journal for Engineering Sciences, 25(1), 20–27.