Massive amplification of surface-induced transport at superhydrophobic surfaces

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dc.contributor.authorHuang, D.
dc.contributor.authorCottin-Bizonne, C.
dc.contributor.authorYbert, C.
dc.contributor.authorBocquet, L.
dc.date.issued2008
dc.description.abstractWe study electro- and diffusio-osmosis of aqueous electrolytes at superhydrophobic surfaces by means of computer simulation and hydrodynamic theory. We demonstrate that the diffusio-osmotic flow at superhydrophobic surfaces can be amplified by more than 3 orders of magnitude relative to flow in channels with a zero interfacial slip. By contrast, little enhancement is observed at these surfaces for electro-osmotic flow. This amplification for diffusio-osmosis is due to the combined effects of enhanced slip and ion surface depletion or excess at the air-water interfaces on superhydrophobic surfaces. This effect is interpreted in terms of capillary driven Marangoni motion. A practical microfluidic pumping device is sketched on the basis of the slip-enhanced diffusio-osmosis at a superhydrophobic surface.
dc.description.statementofresponsibilityDavid M. Huang, Cécile Cottin-Bizonne, Christophe Ybert, and Lydéric Bocquet
dc.identifier.citationPhysical Review Letters, 2008; 101(6):1-4
dc.identifier.doi10.1103/PhysRevLett.101.064503
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.orcidHuang, D. [0000-0003-2048-4500]
dc.identifier.urihttp://hdl.handle.net/2440/64734
dc.language.isoen
dc.publisherAmerican Physical Soc
dc.rights©2008 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevlett.101.064503
dc.titleMassive amplification of surface-induced transport at superhydrophobic surfaces
dc.typeJournal article
pubs.publication-statusPublished

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