Kinetics of capillary wetting in nanoporous films in the presence of surface evaporation
Kinetics of capillary wetting in nanoporous films in the presence of surface evaporation
A liquid in contact with a nanoporous Au film forms a halo of constant width around the droplet. Due to the large surface area-to-volume ratio, one would expect either complete wetting or rejection of the liquid. Instead, a stable halo width is observed, depending on pore size, void fraction, film thickness, and the liquid. This is due to competition between capillary flow and evaporation through the surface of the nanoporous film. A theory is presented that predicts the halo width from the film geometry and liquid properties. Without adjustable parameters, the theory is in good agreement with experimental results.
drops, evaporation, gold, metallic thin films, nanoporous materials, wetting
13128
Seker, Erkin
2583be7e-b2c4-4947-b91e-b5ffd5d4a4df
Begley, Matthew R.
9f4e52bc-507a-4ef6-910f-bd11d25c2209
Reed, Michael L.
dbef6956-692a-40eb-aa11-59b977d34c84
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
7 January 2008
Seker, Erkin
2583be7e-b2c4-4947-b91e-b5ffd5d4a4df
Begley, Matthew R.
9f4e52bc-507a-4ef6-910f-bd11d25c2209
Reed, Michael L.
dbef6956-692a-40eb-aa11-59b977d34c84
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Seker, Erkin, Begley, Matthew R., Reed, Michael L. and Utz, Marcel
(2008)
Kinetics of capillary wetting in nanoporous films in the presence of surface evaporation.
Applied Physics Letters, 92 (1), .
(doi:10.1063/1.2831007).
Abstract
A liquid in contact with a nanoporous Au film forms a halo of constant width around the droplet. Due to the large surface area-to-volume ratio, one would expect either complete wetting or rejection of the liquid. Instead, a stable halo width is observed, depending on pore size, void fraction, film thickness, and the liquid. This is due to competition between capillary flow and evaporation through the surface of the nanoporous film. A theory is presented that predicts the halo width from the film geometry and liquid properties. Without adjustable parameters, the theory is in good agreement with experimental results.
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Published date: 7 January 2008
Keywords:
drops, evaporation, gold, metallic thin films, nanoporous materials, wetting
Organisations:
Magnetic Resonance
Identifiers
Local EPrints ID: 354833
URI: http://eprints.soton.ac.uk/id/eprint/354833
ISSN: 0003-6951
PURE UUID: 1b856b8a-d052-4dfb-bbbc-8c84e999c17e
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Date deposited: 23 Jul 2013 12:14
Last modified: 15 Mar 2024 03:44
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Author:
Erkin Seker
Author:
Matthew R. Begley
Author:
Michael L. Reed
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