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Characterization of Aerosol Generated by Laser Ablation for Inductively Coupled Plasma Mass Spectroscopy.
Holá, M. ; Ondráček, Jakub ; Nováková, H. ; Vojtíšek, M. ; Šperka, J. ; Havlíček, M. ; Kanický, V.
Laser ablation (LA), together with inductively coupled plasma mass spectrometry (ICP-MS) as a detection system, has become a routine method for the direct analysis of various solid samples. The product of laser ablation contains a mixture of vapour, droplets and solid particles. All components are finally transported to a plasma by a carrier gas in form of dry aerosol that includes mainly agglomerates of primary nanoparticles. Dry aerosol can be studied by different offline or online techniques. In general, characterisation of aerosols by their particle size distribution (PSD) represents indispensable tool for fundamental studies of the interaction of laser radiation with various materials. Many works have studied PSD of dry aerosol for different samples, and different ablation conditions (Hola et al., 2010).The laser ablation was performed with nanosecond laser (193 nm) on glass and steel samples using various ablation conditions (spot size, ablation mode, repetition rate, fluence). The aerosol characterization was made first by online PSD monitoring using Engine Exhaust Particle Sizer (EEPS) simultaneously with laser ablation - ICP-MS analysis. Second, the structure of the laser-generated particles was studied off-line using scanning electron microscopy (SEM) and atomic force microscopy (AFM).
Plný tet: SKMBT_C22017103113070 -  PDF
Plný text: content.csg - PDF
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