The public discussion took place for the Doctoral student (Ali Abbas Khdyar) at Anbar University, College of Science, Department of Physics, on Wednesday, 10, September 2025, in Ibn Sina Hall, for his tagged thesis

" Comparative study between Plasma Jet and Laser ablation techniques of Au, Ag/ZnO core-shell Nanoparticles for Biomedical Applications."

The discussion committee consisted of:

 In this study, two types of core-shell nanostructures were synthesized, the first consisting of gold as the core and zinc oxide as the shell, and the second consisting of silver as the core and zinc oxide as the shell, using two techniques: plasma jet and pulsed laser ablation. These nanostructures were examined and tested using multiple examination and analysis techniques, including UV-Vis spectroscopy, X-ray diffraction, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, and zeta potential analysis. Both types of nanostructures prepared by both techniques were applied on skin cancer cells and normal cells for comparison.

This study aimed to Synthesis and characterization of core-shell nanoparticles composed of gold as a core and zinc oxide as a shell, and silver as a core and zinc oxide as a shell, for potential therapeutic applications against skin cancer. Evaluation of the effects of two preparation techniques—pulsed laser ablation and plasma jetting—on the optical, electronic, and structural properties of the nanoparticles. Evaluation of the efficacy of the nanoparticles prepared using both techniques against skin cancer cells and comparison with normal cells.

The optical and electronic properties, morphology, surface roughness, and surface charge type —value of nanostructures is affected by changes in the preparation technique. Plasma jet technology reduces the exposure time required to produce nanoparticles by half, increasing the system's efficiency. The response of cancerous and normal cells changes depending on the properties of the nanostructures.