Influence of Laser Energies on the Generation of Cobalt Oxide Nanoparticles via Laser Ablation in Liquid

Abstract

Nanoparticles fabrication using pulsed laser synthesis is considered a straightforward, reliable, and green approach for the fabrication of nanomaterials. In this study, cobalt oxide (CoO) nanoparticles were synthesized from cobalt targets using pulsed laser ablation inside a 10% v/v ethanol solution. This study examined the effect of the laser energies on the size and morphology of CoO nanoparticles. The size, morphology of the fabricated nanomaterials were studied using transmission electron microscopy (TEM), and their optical properties were obtained using ultraviolet-visible (UV-Vis) spectroscopy. Uniform size distribution of nanoparticles with diameters less than 60 nm was observed at 30, 45, and 60 mJ. The optimum condition at which the CoO nanoparticles are fabricated with a narrower size distribution was reported, which would be helpful in several applications such as electronic thin film, pigments and dyes, capacitors, gas sensors, and lithium-ion batteries.