Unveiling Fundamentals of Multi-Beam Pulsed Laser Ablation in Liquids toward Scaling up Nanoparticle Production

• DOI: 10.3390/nano14040365
• Publication Date: 2024-02-16T08:37:27Z
• Authors: Oleksandr Gatsa; Shabbir Tahir; Miroslava Flimelová; Farbod Riahi; Carlos Doñate-Bue...; Bilal Gökce; Alexander V. Bulg...
• Keywords: nanoparticle yield; beam splitting; Chemistry; diffractive optical elements; 02 engineering and technology; cavitation bubble; 0210 nano-technology; pulsed laser ablation in liquids; QD1-999; Article; high-entropy alloys

Pulsed laser ablation in liquids (PLAL) is a versatile technique to produce high-purity colloidal nanoparticles. Despite considerable recent progress increasing the productivity of technique, there still significant demand for practical, cost-effective method upscaling PLAL synthesis. Here we employ and unveil fundamentals multi-beam (MB) PLAL. The MB-PLAL approach can bypass cavitation bubble, main limiting factor efficiency, by splitting beam into several beams using static diffractive optical elements (DOEs). A multimetallic high-entropy alloy CrFeCoNiMn was used as model material its nanoparticles setup investigated compared with that standard single-beam We demonstrate proposed helps bubble both temporally (lower pulse repetition rates be while keeping optimum processing fluence) spatially scanning speeds are needed) thus dramatically increases nanoparticle yield. Time-resolved imaging performed correlate observed production efficiencies bypassing. results suggest at level g/h achieved strategy compact kW-class lasers simple inexpensive systems.