Study on Wavelength and Energy Effects on Pulsed Laser Ablation Synthesis of Aluminum Nanoparticles in Ethanol

Aluminum nanoparticles were synthesized by pulsed laser ablation of Al sheet targets in ethanol for 10 minutes. Effect of laser wavelength was studied using 1064 and 533 nm wavelengths, and effect of its energy per pulse was surveyed applying energies of 280-400 mj. Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) images, Laser Particle Size Analyzer (LPSA), UV-Visible absorption Spectra, and weight changes of targets were exploited for characterization and comparison of products. It has been found that the higher wavelength leads to significantly more ablation efficiency and finer spherical nanoparticles. It, moreover, was understood that increase of the laser energy results in both higher ablation efficiency and larger nanoparticles.