Hydrodynamic Force Measurements: Boundary Slip of Water on Hydrophilic Surfaces and Electrokinetic Effects

Elmar Bonaccurso, Michael Kappl, and Hans-Jürgen Butt
Phys. Rev. Lett. 88, 076103 – Published 1 February 2002
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Abstract

The hydrodynamic drainage force of aqueous medium between smooth hydrophilic surfaces was measured with the colloidal probe technique up to shear rates of typically 104s1. Measured force curves were compared to simulations. To reach agreement between experimental and simulated force curves, the hydrodynamic force had to be fitted with a model allowing for boundary slippage. Boundary slip was characterized by a slip length of 89nm. Force measurements with charged surfaces could be simulated taking only hydrodynamic and electrostatic double-layer forces into account.

  • Received 11 June 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.076103

©2002 American Physical Society

Authors & Affiliations

Elmar Bonaccurso, Michael Kappl, and Hans-Jürgen Butt*

  • Physikalische Chemie II, Universität Siegen, 57068 Siegen, Germany

  • *Corresponding author. Email address: butt@chemie.uni-siegen.de

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Vol. 88, Iss. 7 — 18 February 2002

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