Measurement of the slip length of water flow on graphite surface

Abdelhamid Maali (1) , Touria Cohen-Bouhacina (1) , Hamid Kellay (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne

We present measurements of the hydrodynamic damping of an atomic force microscopy cantilever-tip immersed in water and approaching a mica surface or a graphite surface. Water completely wets the mica surface while it partially wets the graphite surface with a contact angle of 74°. The measurements show that the damping is higher on mica than on graphite giving a slip length of about 8 nm on this latter surface.

Domaines: Dynamique des Fluides [physics.flu-dyn]

Abdelhamid Maali, Touria Cohen-Bouhacina, Hamid Kellay. Measurement of the slip length of water flow on graphite surface. Applied Physics Letters, 2008, 92 (5), pp.053101 (1-2). ⟨10.1063/1.2840717⟩. ⟨hal-00762539⟩