Investigating the Optical Qualities of Aluminum Nanoparticles with Nd:YAG Pulsed Laser Ablation in Liquid Technology

This research investigated the preparation of aluminum nanoparticles using pulsed laser ablation in liquid (PLAL). Ablation was performed on a metallic target in distilled water using a 532 nm Nd:YAG laser at different laser energies (400, 600, and 800 mJ) with a repetition frequency of 1 Hz and 300 pulses. A change in the solution's color is one of the first indicators of nanoparticle formation. We observed a change in the color of the deionized distilled water from light white to dark white, suggesting the production of aluminum nanoparticles. Furthermore, UV-VIS measurements showed an increase in the material concentration with increasing laser pulse energy. This is attributed to the increased number of ablated particles. A blue shift in the absorption spectrum with increasing laser pulse energy was also observed, indicating the formation of smaller nanoparticles. High laser energy effectively enhances the production efficiency of nanoparticles and controls their optical and electronic properties, making pulsed laser ablation a promising tool for high-precision nanomaterial preparation.