Velocity Profiles of Water Flowing Past Solid Glass Surfaces Using Fluorescent Nanoparticles and Molecules as Velocity Probes

D. Lasne, A. Maali, Y. Amarouchene, L. Cognet, B. Lounis, and H. Kellay
Phys. Rev. Lett. 100, 214502 – Published 28 May 2008

Abstract

Measurements of the velocity profile of water flowing on a glass surface using fluorescent nanoparticles and single fluorescent molecules as velocity probes show that the no slip boundary condition holds down to at least 10 nm from the surface. For water flowing on a hydrophobic solid surface, silanized glass, the no slip boundary condition fails, and a slip length of 45 nm is measured. These velocity measurements are complemented with atomic force microscopy measurements of dissipation on a small sphere oscillating near the surface with results in agreement with the velocity profiles.

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  • Received 27 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.214502

©2008 American Physical Society

Authors & Affiliations

D. Lasne, A. Maali, Y. Amarouchene, L. Cognet, B. Lounis, and H. Kellay

  • Université Bordeaux 1, Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798 du CNRS, 351 cours de la Libération, 33405, Talence, France

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Vol. 100, Iss. 21 — 30 May 2008

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