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https://hdl.handle.net/2440/65149
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Type: | Journal article |
Title: | Water slippage versus contact angle: a quasiuniversal relationship |
Author: | Huang, D. Sendner, C. Horinek, D. Netz, R. Bocquet, L. |
Citation: | Physical Review Letters, 2008; 101(22):1-4 |
Publisher: | American Physical Soc |
Issue Date: | 2008 |
ISSN: | 0031-9007 1079-7114 |
Statement of Responsibility: | David M. Huang, Christian Sendner, Dominik Horinek, Roland R. Netz and Lydéric Bocquet |
Abstract: | Using molecular dynamics simulations of an atomistic water model, we study the interfacial hydrodynamic slippage of water at various hydrophobic surfaces, both organic (silane monolayers) and inorganic (diamondlike and Lennard-Jones models). The measured slip lengths range from nanometers to tens of nanometers. Slip lengths on different surfaces are found to collapse nearly onto a single curve as a function of the static contact angle characterizing the surface wettability, thereby suggesting a quasiuniversal relationship. This dependence is rationalized on the basis of a simple scaling description of the fluid-solid friction at the microscopic level. The link between slippage and water depletion at hydrophobic surfaces is clarified. These results shed light on the controversy over experimental measurements of the slip length at smooth hydrophobic surfaces. |
Keywords: | Water Aquaporins Microfluidic Analytical Techniques Surface Properties Thermodynamics Models, Chemical Computer Simulation Hydrophobic and Hydrophilic Interactions |
Rights: | ©2008 American Physical Society |
DOI: | 10.1103/PhysRevLett.101.226101 |
Published version: | http://dx.doi.org/10.1103/physrevlett.101.226101 |
Appears in Collections: | Aurora harvest 5 Chemistry and Physics publications |
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hdl_65149.pdf | Published version | 463.83 kB | Adobe PDF | View/Open |
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