Nanosecond laser irradiations were used to induce a dewetting process of a thin Au film on SiO2/Si. The melting and solidification dynamics of the film under the irradiations lead to a dewetting process whose driving force was identified in a Rayleigh instability mechanism. Such a mechanism determines the formation of Au nanoparticles from the melted quasi-continuous starting Au film. The mean nanoparticles size and spacing were quantified, finding their correlation as described by the surfacediffusion- limited Rayleigh instability theory.

Formation of nanoparticles from laser irradiated Au thin film on SiO2/Si: Elucidating the Rayleigh-instability role

RUFFINO, FRANCESCO;GRIMALDI, Maria Grazia
2012-01-01

Abstract

Nanosecond laser irradiations were used to induce a dewetting process of a thin Au film on SiO2/Si. The melting and solidification dynamics of the film under the irradiations lead to a dewetting process whose driving force was identified in a Rayleigh instability mechanism. Such a mechanism determines the formation of Au nanoparticles from the melted quasi-continuous starting Au film. The mean nanoparticles size and spacing were quantified, finding their correlation as described by the surfacediffusion- limited Rayleigh instability theory.
2012
Rayleigh instability; Au nanoparticles; laser irradiations
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/47858
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