Sulfur nanoparticle (NPs) solutions were prepared by using the laser ablation of sulfur targets in distilled water. A ns pulsed Nd:YAG laser operated at an energy of 300 mJ, with a wavelength of 1064 nm and a repetition rate of 1 Hz. The concentration of nanoparticles was controlled by the measured ablation yield (1 μ g/pulse at 300 mJ) and the total irradiation time, which ranged from 30 min to 3 h. The NPs solution was characterized using various optical spectroscopic techniques in the visible, near-UV, and IR regions. Crystalline NPs were synthesized with a spherical shape and a size of about 20 nm. Additionally, several physical parameters of the NPs solution were measured, including density, surface tension, viscosity, pH, and wetting angle on different surfaces. The laser-generated sulfur-plasma was investigated in a vacuum to enhance understanding of its atomic and molecular composition. A mass quadrupole spectrometer was employed to observe the S molecules generated by atom nucleation in a vacuum. Some applications of sulfur nanoparticles are presented and discussed.
Sulfur Nanoparticles by laser ablation, synthesis, characterizations, and applications
Torrisi, A.
2026-01-01
Abstract
Sulfur nanoparticle (NPs) solutions were prepared by using the laser ablation of sulfur targets in distilled water. A ns pulsed Nd:YAG laser operated at an energy of 300 mJ, with a wavelength of 1064 nm and a repetition rate of 1 Hz. The concentration of nanoparticles was controlled by the measured ablation yield (1 μ g/pulse at 300 mJ) and the total irradiation time, which ranged from 30 min to 3 h. The NPs solution was characterized using various optical spectroscopic techniques in the visible, near-UV, and IR regions. Crystalline NPs were synthesized with a spherical shape and a size of about 20 nm. Additionally, several physical parameters of the NPs solution were measured, including density, surface tension, viscosity, pH, and wetting angle on different surfaces. The laser-generated sulfur-plasma was investigated in a vacuum to enhance understanding of its atomic and molecular composition. A mass quadrupole spectrometer was employed to observe the S molecules generated by atom nucleation in a vacuum. Some applications of sulfur nanoparticles are presented and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
