Journal
PHYSICS OF FLUIDS
Volume 23, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3665618
Keywords
-
Categories
Funding
- WKU Faculty Scholarship Council [10-7016, 10-7054]
- NSF [DMI-0449258, CMMI-0855949]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0855949] Funding Source: National Science Foundation
Ask authors/readers for more resources
Dewetting of pulsed-laser irradiated, thin (< 20 nm), optically reflective metallic bilayers on an optically transparent substrate with a reflective support layer is studied within the lubrication equations model. A steady-state bilayer film thickness (h) dependent temperature profile is derived based on the mean substrate temperature estimated from the elaborate thermal model of transient heating and melting/freezing. Large thermocapillary forces are observed along the plane of the liquid-liquid and liquid-gas interfaces due to this h-dependent temperature, which, in turn, is strongly influenced by the h-dependent laser light reflection and absorption. Consequently the dewetting is a result of the competition between thermocapillary and intermolecular forces. A linear analysis of the dewetting length scales established that the non-isothermal calculations better predict the experimental results as compared to the isothermal case within the bounding Hamaker coefficients. Subsequently, a computational non-linear dynamics study of the dewetting pathway was performed for Ag/Co and Co/Ag bilayer systems to predict the morphology evolution. We found that the systems evolve towards formation of different morphologies, including core-shell, embedded, or stacked nanostructure morphologies. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665618]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available