Investigation of Physical Properties of Cobalt Nanoparticles Synthesized via Pulsed Laser Ablation in Liquid

IRAQI JOURNAL OF APPLIED PHYSICS Vol. 21, No. 1, January-March 2025, pp. 49-54 Fatima M. Ahmed 1 Investigation of Physical Properties Khalil I. Mohammed 2 Rafea A. Munef 1 of Cobalt Nanoparticles Synthesized 1 via Pulsed Laser Ablation in Liquid Department... More

IRAQI JOURNAL OF APPLIED PHYSICS Vol. 21, No. 1, January-March 2025, pp. 49-54 Fatima M. Ahmed 1 Investigation of Physical Properties Khalil I. Mohammed 2 Rafea A. Munef 1 of Cobalt Nanoparticles Synthesized 1 via Pulsed Laser Ablation in Liquid Department of Physics, College of Science, University of Kirkuk, Kirkuk, IRAQ Cobalt nanoparticles with 99.99% purity were synthesized from cobalt flakes using pulsed 2 Department of Physics, laser ablation in liquid with a Nd:YAG laser. Two laser wavelengths (532 and 1064 nm) College of Education for and various laser fluences (30, 40, 50, and 60 J/cm²) were employed, with 300 pulses at Pure Science, a 6 Hz repetition rate. The UV-visible spectroscopy revealed optical absorption peaks in University of Kirkuk, the range of 270-297 nm. The x-ray diffraction analysis confirmed that the cobalt Kirkuk, IRAQ nanoparticles exhibit a cubic crystalline structure. Atomic force microscopy showed that increasing laser fluence reduced the particle size. Fi Less