Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 23, Pages 9461-9465Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2012.04.117
Keywords
Laser processing; Nanopowders; Modeling
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Funding
- Conseil Regional de Bourgogne, France
- 'Grand Chalon', France
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Nanoparticles formation in a laser-induced plasma plume in the ambient air has been investigated by using numerical simulations and physical models. For high irradiances, or for ultrashort laser pulses, nanoparticles are formed by condensation, as fine powders, in the expanding plasma for very high pairs of temperature and pressure. At lower irradiances, or nanosecond laser pulses, another thermodynamic paths are possible, which cross the liquid-gas transition curve while laser is still heating the target and the induced plasma. In this work, we explore the growth of nanoparticles in the plasma plume induced by nanosecond pulsed lasers as a function of the laser irradiance. Moreover, the influence of the ambient gas has also been investigated. (c) 2012 Elsevier B.V. All rights reserved.
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