The Laser ablation in liquid is a technique attracting a growing interest in the scientific and technological communities due to the possibility of obtaining stable nanoparticles in liquid media [1]. In particular the ablation of carbon based targets is of particular importance due to the possibility to obtain different carbon allotropes by varying the experimental parameters [2]. We have investigated the ablation of a fullerite target in different media (water and H2O2) by two femtosecond laser sources (Nd:glass 527nm, 250fs and 10 Hz and Ti:sapphire 800nm, 100fs and 1kHz). The aim of this study was to compare the effect of different parameters (wavelength, repetition frequency and liquid media) on the physical and chemical processes involved during the ablation and, consequently, on the obtained nanoparticles properties. The ablation process has been studied both by shadowgraphic technique and optical emission spectroscopy. The obtained products have been characterized by transmission electron and scanning electron microscopies, by X-ray photoelectron and micro-Raman spectroscopies and X-ray diffraction.
Ultrashort laser ablation of fullerite in liquid media
JV Rau;A Santagata;
2014
Abstract
The Laser ablation in liquid is a technique attracting a growing interest in the scientific and technological communities due to the possibility of obtaining stable nanoparticles in liquid media [1]. In particular the ablation of carbon based targets is of particular importance due to the possibility to obtain different carbon allotropes by varying the experimental parameters [2]. We have investigated the ablation of a fullerite target in different media (water and H2O2) by two femtosecond laser sources (Nd:glass 527nm, 250fs and 10 Hz and Ti:sapphire 800nm, 100fs and 1kHz). The aim of this study was to compare the effect of different parameters (wavelength, repetition frequency and liquid media) on the physical and chemical processes involved during the ablation and, consequently, on the obtained nanoparticles properties. The ablation process has been studied both by shadowgraphic technique and optical emission spectroscopy. The obtained products have been characterized by transmission electron and scanning electron microscopies, by X-ray photoelectron and micro-Raman spectroscopies and X-ray diffraction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
