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Updated: Sep 15, 2026

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
Published on: July 18, 2014
Hydrodynamic force measurements: boundary slip of water on hydrophilic surfaces and electrokinetic effects
Elmar Bonaccurso1, Michael Kappl, Hans-Jürgen Butt
1Physikalische Chemie II, Universität Siegen, 57068 Siegen, Germany.
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 10(4) s(-1). 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 8-9 nm. Force measurements with charged surfaces could be simulated taking only hydrodynamic and electrostatic double-layer forces into account.
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