title: Evidence of the no-slip boundary condition of water flow between hydrophilic surfaces using atomic force microscopy.
abstract: In this study we present measurements of the hydrodynamic force exerted on a glass sphere glued to an atomic force microscopy (AFM) cantilever approaching a mica surface in water. A large sphere was used to reduce the impact of the cantilever beam on the measurement. An AFM cantilever with large stiffness was used to accurately determine the actual contact position between the sphere and the sample surface. The measured hydrodynamic force with different approach velocities is in good agreement with the Taylor force calculated in the lubrication theory with the no-slip boundary conditions, which verifies that there is no boundary slip on the glass and mica surfaces. Moreover, a detailed procedure of how to subtract the electrostatic double-layer force is presented.
authors.affiliation: Centre de Physique Moleculaire Optique et Hertzienne, University Bordeaux I 351 cours de la Liberation, F-33405 Talence, France.
authors.forename: Abdelhamid
authors.initials: A
authors.lastname: Maali
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Wang
authors.forename: Bharat
authors.initials: B
authors.lastname: Bhushan
mesh_terms: D057927:Hydrophobic and Hydrophilic Interactions; D018625:Microscopy, Atomic Force; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water