Controlling Nanoparticles Formation in Molten Metallic Bilayers by Pulsed-Laser Interference Heating

M. Khenner; S. Yadavali; R. Kalyanaraman

Mathematical Modelling of Natural Phenomena (2012)

  • Volume: 7, Issue: 4, page 20-38
  • ISSN: 0973-5348

Abstract

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The impacts of the two-beam interference heating on the number of core-shell and embedded nanoparticles and on nanostructure coarsening are studied numerically based on the non-linear dynamical model for dewetting of the pulsed-laser irradiated, thin (< 20 nm) metallic bilayers. The model incorporates thermocapillary forces and disjoining pressures, and assumes dewetting from the optically transparent substrate atop of the reflective support layer, which results in the complicated dependence of light reflectivity and absorption on the thicknesses of the layers. Stabilizing thermocapillary effect is due to the local thickness-dependent, steady-state temperature profile in the liquid, which is derived based on the mean substrate temperature estimated from the elaborate thermal model of transient heating and melting/freezing. Linear stability analysis of the model equations set for Ag/Co bilayer predicts the dewetting length scales in the qualitative agreement with experiment.

How to cite

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Khenner, M., Yadavali, S., and Kalyanaraman, R.. "Controlling Nanoparticles Formation in Molten Metallic Bilayers by Pulsed-Laser Interference Heating." Mathematical Modelling of Natural Phenomena 7.4 (2012): 20-38. <http://eudml.org/doc/222378>.

@article{Khenner2012,
abstract = {The impacts of the two-beam interference heating on the number of core-shell and embedded nanoparticles and on nanostructure coarsening are studied numerically based on the non-linear dynamical model for dewetting of the pulsed-laser irradiated, thin (< 20 nm) metallic bilayers. The model incorporates thermocapillary forces and disjoining pressures, and assumes dewetting from the optically transparent substrate atop of the reflective support layer, which results in the complicated dependence of light reflectivity and absorption on the thicknesses of the layers. Stabilizing thermocapillary effect is due to the local thickness-dependent, steady-state temperature profile in the liquid, which is derived based on the mean substrate temperature estimated from the elaborate thermal model of transient heating and melting/freezing. Linear stability analysis of the model equations set for Ag/Co bilayer predicts the dewetting length scales in the qualitative agreement with experiment.},
author = {Khenner, M., Yadavali, S., Kalyanaraman, R.},
journal = {Mathematical Modelling of Natural Phenomena},
keywords = {liquid bilayer films; thermocapillary convection; interfacial stability; pulsed laser irradiation; dewetting; self-organization; nanopatterning},
language = {eng},
month = {7},
number = {4},
pages = {20-38},
publisher = {EDP Sciences},
title = {Controlling Nanoparticles Formation in Molten Metallic Bilayers by Pulsed-Laser Interference Heating},
url = {http://eudml.org/doc/222378},
volume = {7},
year = {2012},
}

TY - JOUR
AU - Khenner, M.
AU - Yadavali, S.
AU - Kalyanaraman, R.
TI - Controlling Nanoparticles Formation in Molten Metallic Bilayers by Pulsed-Laser Interference Heating
JO - Mathematical Modelling of Natural Phenomena
DA - 2012/7//
PB - EDP Sciences
VL - 7
IS - 4
SP - 20
EP - 38
AB - The impacts of the two-beam interference heating on the number of core-shell and embedded nanoparticles and on nanostructure coarsening are studied numerically based on the non-linear dynamical model for dewetting of the pulsed-laser irradiated, thin (< 20 nm) metallic bilayers. The model incorporates thermocapillary forces and disjoining pressures, and assumes dewetting from the optically transparent substrate atop of the reflective support layer, which results in the complicated dependence of light reflectivity and absorption on the thicknesses of the layers. Stabilizing thermocapillary effect is due to the local thickness-dependent, steady-state temperature profile in the liquid, which is derived based on the mean substrate temperature estimated from the elaborate thermal model of transient heating and melting/freezing. Linear stability analysis of the model equations set for Ag/Co bilayer predicts the dewetting length scales in the qualitative agreement with experiment.
LA - eng
KW - liquid bilayer films; thermocapillary convection; interfacial stability; pulsed laser irradiation; dewetting; self-organization; nanopatterning
UR - http://eudml.org/doc/222378
ER -

References

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