Temporally-Resolved Measurements on Growth Processes of Nanoparticles in Laser Ablation

Abstract

This review article reports the growth processes of nanoparticles in laser ablation processes. The growth process of carbon nanoparticles in the laser ablation of a graphite target was investigated by laser-induced fl uorescence imaging spectroscopy, which provided the temporal variations of the distributions of C 2 and C 3 densities. The temporal variation of the plume temperature distribution was also measured by laser-induced fl uorescence imaging spectroscopy. The growth process of carbon nanoparticles was discussed by considering the correlations among the C 2 and C 3 densities and the plume temperature. The growth process of titanium nanoparticles in liquid-phase laser ablation was investigated by laser-light scattering combined with shadowgraph imaging. The preliminary experimental results indicate that the nanoparticle growth inside the cavitation bubble was induced by laser ablation.