Emission spectra investigation of fs induced NPs probed by the ns laser pulse of a fs/ns DP-LIBS orthogonal configuration
| Autor: | Antonio Santagata, G.P. Parisi, G. Albano, A. De Bonis, P. Villani, D. Spera, Roberto Teghil, Daniel J. Sordelet |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
business.industry
Chemistry Thermodynamic equilibrium Resolution (electron density) Physics::Optics General Physics and Astronomy Surfaces and Interfaces General Chemistry Plasma Condensed Matter Physics Laser Surfaces Coatings and Films law.invention Optics law Ns laser probe Dual-pulse LIBS Laser induced emission spectroscopy Fs-pulsed laser ablation Nanoparticles detection Quasicrystal Emission spectrum Laser-induced breakdown spectroscopy Atomic physics business Spectroscopy Excitation |
| Zdroj: | Applied surface science 255 (2009): 5159–5162. doi:10.1016/j.apsusc.2008.08.075 info:cnr-pdr/source/autori:A. Santagata, G. Albano, D. Spera, R. Teghil, P. Villani, G.P. Parisi, A. De Bonis, D.J. Sordelet/titolo:Emission spectra investigation of fs induced Nps probed by the ns laser pulse of a fs%2Fns DP-LIBS orthogonal configuration/doi:10.1016%2Fj.apsusc.2008.08.075/rivista:Applied surface science/anno:2009/pagina_da:5159/pagina_a:5162/intervallo_pagine:5159–5162/volume:255 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2008.08.075 |
| Popis: | A dual-pulse fs/ns laser induced breakdown spectroscopy configuration, where an initial 250 fs ablating pulsed laser followed by a delayed ns laser beam placed at a fixed distance, orthogonally with the expanding plasma plume, has been used in air on a Al 65 Cu 23 Fe 12 quasicrystal. The obtained emission data were acquired with a set-up arrangement providing space detections, with a resolution up to 15 μm, of the ns laser pulse generated signals. Assuming the fulfillment of local thermodynamic equilibrium conditions, the role played by the time lag between the two laser beams on the induced plasma excitation temperatures and electronic densities, as well as a space resolved process survey, has been followed. The spatial and time resolved spectra show, almost, steady values of the determined elementary plasma features with the development of nanoparticles occurring during the fs laser pulsed ablation process. The ns laser probe of the dual-pulse LIBS configuration here presented confirms that the nanoparticles induced can be largely widespread in both space and time whose compositions, overall, could retain the starting target stoichiometry. It is shown that these nanoparticles formation can actually take place at different times following the initial ultra-short laser beam incidence and that, especially at long inter-pulse delays (>100 μs), modest compositional changes can be observed. |
| Databáze: | OpenAIRE |
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