20 research outputs found
Competition between collapse and breakup in nanometer-sized thin rings using molecular dynamics and continuum modeling
We consider nanometer-sized fluid annuli (rings) deposited on a solid substrate and ask whether these rings break up into droplets due to the instability of Rayleigh-Plateau-type modified by the presence of the substrate, or collapse to a central drop due to the presence of azimuthal curvature. The analysis is carried out by a combination of atomistic molecular dynamics simulations and a continuum model based on a long-wave limit of Navier-Stokes equations. We find consistent results between the two approaches, and demonstrate characteristic dimension regimes which dictate the assembly dynamics.Fil: Nguyen, Trung Dac. Oak Ridge National Laboratory; Estados UnidosFil: Fuentes-Cabrera, Miguel. Oak Ridge National Laboratory; Estados UnidosFil: Fowlkes, Jason D.. Oak Ridge National Laboratory; Estados UnidosFil: Diez, Javier Alberto. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: González, Alejandro G.. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; ArgentinaFil: Kondic, Lou. New Jersey Institute Of Technology; Estados UnidosFil: Rack, Philip D.. Oak Ridge National Laboratory; Estados Unido
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments