Nanoscale Hydrodynamic Instability in a Molten Thin Gold Film Induced by Femtosecond Laser Ablationстатья
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:A mechanism of the formation of a nanotip with a nanoparticle at its top that appears in a thin metal film
irradiated by a single femtosecond laser pulse has been studied experimentally and theoretically. It has been
found that the nanotip appears owing to a melt flow and a nanojet formation, which is cooled and solidified.
Within a proposed hydrodynamic model, the development of thermocapillary instability in the melted film is
treated with the use of the Kuramoto–Sivashinskytype hydrodynamic equation. The simulation shows that
the nanojet nucleates in the form of a nanopeak in a pit on the top of a microbump (linear stage) and, then,
grows in a nonlinear (explosive) regime of an increase in thermocapillary instability in good agreement with
experimental data