Reducing nanoparticles in metal ablation plumes produced by two delayed short laser pulses

Journal Article · Mon Feb 02 00:00:00 EST 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3079404· OSTI ID:21175947

Noeel, Sylvie; Hermann, Joerg ^[1]

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1. LP3-UMR6182, CNRS-University of Marseille, Luminy C.917, 13288 Marseille (France)

Using fast imaging and atomic force microscopy, we demonstrate that the fraction of nanoparticles in ablation plumes produced by short pulse laser irradiation of metals is strongly altered when a second laser pulse of sufficiently large delay is applied. Comparing the results obtained for gold and copper, it is shown that a significant nanoparticle reduction is only observed if the delay between both laser pulses exceeds the characteristic time of electron-lattice thermalization. We propose the reduced electronic heat transport at large lattice temperature as the dominant mechanisms for the observed nanoparticle reduction.

• OSTI ID: 21175947
• Journal Information: Applied Physics Letters, Vol. 94, Issue 5; Other Information: DOI: 10.1063/1.3079404; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABLATION
ATOMIC FORCE MICROSCOPY
COPPER
GOLD
HEAT TRANSFER
LASER RADIATION
LASERS
NANOSTRUCTURES
PARTICLES
PLASMA PRODUCTION
PULSES
THERMALIZATION