title: Oscillatory dissipation of a simple confined liquid.
abstract: We present a sensitive measurement of the dissipation and the effective viscosity of a simple confined liquid (octamethylcyclotetrasiloxane) using an atomic force microscope. The experimental data show that the damping and the effective viscosity increase and present oscillations as the gap between the cantilever tip and the surface is diminished. To our knowledge, the damping and the viscosity modulation are reported here with such good accuracy for the first time. Such an experimental result is different from what has been reported earlier where only a continuous increase of the damping and the viscosity are observed.
authors.affiliation: CPMOH, Université Bordeaux1, 351 Cours de la Libération, 33405 Talence, France. a.maali@cpmoh.u-bordeaux1.fr
authors.forename: Abdelhamid
authors.initials: A
authors.lastname: Maali
authors.forename: Touria
authors.initials: T
authors.lastname: Cohen-Bouhacina
authors.forename: Gérard
authors.initials: G
authors.lastname: Couturier
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Aimé