Slip and depletion in a Newtonian liquidM. Wolff1, 2, B. Akgun3, 4, M. Walz5, A. Magerl5 and H. Zabel1
1 Institute for Solid State Physics/EP IV, Ruhr University Bochum - 44780 Bochum, Germany, EU
2 Institute Laue-Langevin - BP 156, 38042 Grenoble, France, EU
3 NIST Center for Neutron Research, National Institute of Standards and Technology - Gaithersburg MD 20899, USA
4 Department of Materials Science and Engineering, University of Maryland - College Park, MD 20742, USA
5 Chair for Crystallography and Structural Physics, University of Erlangen - 91058 Erlangen, Germany, EU
received 21 December 2007; accepted in final form 18 March 2008; published May 2008
published online 21 April 2008
Despite the fact that the magnitude of surface slip, which may occur for a liquid flowing past a solid wall, was quantified by different experimental techniques, the microscopic origin of this effect remains unclear. In the present article we present a neutron reflectivity study for a Newtonian liquid, hexadecane, in contact with solid walls at rest and under shear. In this system slip is not explained by a depleted liquid layer.
61.05.fj - Neutron reflectometry.
68.08.Bc - Wetting.
81.40.Pq - Friction, lubrication, and wear.
© EPLA 2008