Articolo in rivista, 2020, ENG, 10.1016/j.apsusc.2020.146031

Plasma charging effect on the nanoparticles releasing from the cavitation bubble to the solution during nanosecond Pulsed Laser Ablation in Liquid

Dell'Aglio, Marcella; De Giacomo, Alessandro

CNR-NANOTEC; Università di Bari, Dip. di Chimica

The laser induced plasma during the nanosecond Pulsed Laser Ablation in Liquid (PLAL) plays a crucial role in the nanoparticles (NPs) formation and charging. It was demonstrated that during the plasma phase evolution, once the NPs are formed, they are charged with the excess of plasma electrons. Immediately after the plasma phase extinguishes, the NPs will be released in the induced vapor bubble, generated by the fast energy exchanges between the plasma and the liquid. The excess of charge in the NPs preserves them from the agglomeration during the bubble evolution and can induces an electrostatic pressure able to eject the particles outside the cavitation bubble.

Applied surface science 515

Keywords

Pulsed Laser Ablation in Liquid (PLAL), Laser Ablation Synthesis in Solution (LASIS), NPs releasing, NP formation, Cavitation bubble

CNR authors

De Giacomo Alessandro, Dell Aglio Marcella

CNR institutes