Visualization and control of Si nanoparticle behavior in laser-ablation plume

Summary form only given. Laser ablation has been widely used to generate the luminescent Si nanoparticles. The details of the nanoparticle formation process have not been well understood. The formation process is usually controlled by changing the ablation conditions such as the position of the substrate, ambient gas pressure, and laser fluence for the ablation. In this study, we investigated an influence of applied electric field on nanoparticle behavior near the substrate to establish an active control means for the nanoparticle deposition process. The behavior of nanoparticles and Si atoms under various deposition conditions was investigated by Rayleigh scattering and laser-induced fluorescence imaging systems.