| Issue |
La Houille Blanche
Number 1, Février 2008
|
|
|---|---|---|
| Page(s) | 83 - 90 | |
| Section | Prix Jean Valembois 2007 - Nanohydrodynamique : interface liquide-solide | |
| DOI | https://doi.org/10.1051/lhb:2008009 | |
| Published online | 20 March 2008 | |
Nanohydrodynamique près d’une surface solide : caractérisation expérimentale à l’équilibre
Nanohydrodynamics at liquid-solid interfaces : experimental characterization without external forcing
1
Laboratoire de Physique de la Matière Condensée et Nanostructures Université de Lyon, F-69000, France ; Univ. Lyon 1
2
Laboratoire PMCN ; CNRS, UMR 5586 ; F-69622 Villeurbanne Cedex
Auteur de correspondance : laurent.joly@univ-lyon1.fr
We report on a new method to characterize the hydrodynamic boundary condition (HBC) relying solely on the measurement of the thermal motion of confined colloids, using a home build fluorescence correlation spectroscopy (FCS) setup. With this method, we show that, for smooth surfaces, the HBC depends on the wetting properties of the wall : while the no-slip assumption is fulfilled on hydrophilic surfaces, a finite slippage is measured on hydrophobic surfaces, with a characteristic slip length of 18 ± 5 nm.
© Société Hydrotechnique de France, 2008