Water in contact with extended hydrophobic surfaces: direct evidence of weak dewetting |
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Authors: | Jensen Torben R Østergaard Jensen Morten Reitzel Niels Balashev Konstantin Peters Günther H Kjaer Kristian Bjørnholm Thomas |
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Institution: | Materials Research Department, Ris? National Laboratory, DK-4000 Roskilde, Denmark. |
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Abstract: | X-ray reflectivity measurements reveal a significant dewetting of a large hydrophobic paraffin surface floating on water. The dewetting phenomenon extends less than 15 A into the bulk water phase and results in an integrated density deficit of about one water molecule per 25-30 A(2) of water in contact with the paraffin surface. The results are supported by molecular dynamics simulations and related to the hydrophobic effect. |
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