Effect of Laser Pulse Energy on the Formation of Alumina Nanoparticles Synthesized by Laser Ablation in Water

Abstract

Alumina nanoparticles were synthesized from a bulk aluminium using laser ablation from Nd:YAG laser with a wavelength of 1064 nm in deionized water. Physical and chemical properties of the nanoparticles were investigated as a function of the laser pulse energies, including 1, 3 and 5 J. 3 J of laser energy offered plenty of spherical nanoparticles with a uniform size distribution of less than 100 nm. UV-visible spectroscopy was used to evaluate the optical property of the obtained suspension, representing a strong peak at 213 nm. XRD analysis showed that plenty of the nanoparticles are κ-Al2O3, which would be very useful for many applications.