INVESTIGADORES
GONZALEZ Alejandro Guillermo
congresos y reuniones científicas
Título:
Pulsed laser induced self-assembly of nanoparticle arrays: Competing liquid phase instabilities
Autor/es:
J. A. DIEZ; A. G. GONZÁLEZ; Y. WU; J. D. FOWLKES; N. A. ROBERTS; P. D. RACK; L. KONDIC
Lugar:
Baltimore
Reunión:
Conferencia; 64th Annual Meeting of the APS Division of Fluid Dynamics; 2011
Institución organizadora:
American Physical Society
Resumen:
Thin film copper rings were synthesized on silicon dioxide thin
films with various radii, thicknesses and widths and were
subsequently liquefied via a nanosecond pulse laser treatment.
During the nanoscale liquid lifetimes, the rings experience
competing retraction dynamics and thin film and/or
Rayleigh-Plateau type of instability, which lead to arrays of
ordered nanodroplets. Ultimately, the original geometry dictates
the instability pathway, which for narrow rings obeys the
Rayleigh-Plateau type of instability, while for wider rings is
influenced by the thin film instability. Hydrodynamic simulations
describe well the observed time and length scales as well as the
observed radial and circumferential instabilities which lead to
different nanodroplet ensembles.