Nanorheology : an Investigation of the Boundary Condition at Hydrophobic and Hydrophilic Interfaces

Abstract

t has been shown that the flow of a simple liquid over a solid surface can violate the so-called no-slip boundary condition. We investigate the flow of polar liquids, water and glycerol, on a hydrophilic Pyrex surface and a hydrophobic surface made of a Self-Assembled Monolayer of OTS (octadecyltrichlorosilane) on Pyrex. We use a Dynamic Surface Force Apparatus (DSFA) which allows one to study the flow of a liquid film confined between two surfaces with a nanometer resolution. No-slip boundary conditions are found for both fluids on hydrophilic surfaces only. Significant slip is found on the hydrophobic surfaces, with a typical length of one hundred nanometers.

8 pages, 7 figures, 2 tables. Accepted for European Physical Journal E - Sofr Mater

Cited by in corpus (24)

• Low Friction Flows of Liquids at Nanopatterned Interfaces
• Dynamics of simple liquids at heterogeneous surfaces : Molecular Dynamics simulations and hydrodynamic description
• Slip at Fluid-Solid Interface
• Shear-dependent apparent slip on hydrophobic surfaces: The Mattress Model
• Brownian motion near a partial-slip boundary: A local probe of the no-slip condition
• Lattice Boltzmann simulations of apparent slip in hydrophobic microchannels
• Elastohydrodynamic lift at a soft wall
• Lattice Boltzmann simulations in microfluidics: probing the no-slip boundary condition in hydrophobic, rough, and surface nanobubble laden microchannels
• Slip length dependent propulsion speed of catalytic colloidal swimmers near walls
• Slip-controlled thin film dynamics
• Shear rate threshold for the boundary slip in dense polymer films
• Simulations of slip flow on nanobubble-laden surfaces
• A Universal Molecular-Kinetic Scaling Relation for Slip of a Simple Fluid at a Solid Boundary
• Correlation between surface topography and slippage: a Molecular Dynamics study
• Apparent slip due to the motion of suspended particles in flows of electrolyte solutions
• Rheological study of polymer flow past rough surfaces with slip boundary conditions
• Rate effects on layering of a confined linear alkane
• Drainage of a nanoconfined simple fluid: rate effects on squeeze-out dynamics
• Comparison of the slip of a PDMS melt on weakly adsorbing surfaces measured by a new photobleaching-based technique
• Microscopic determination of macroscopic boundary conditions in Newtonian liquids
• Hybrid continuum-molecular modeling of fluid slip flow
• A flexible rheometer design to measure the visco-elastic response of soft solids over a wide range of frequency
• Slip-flow theory for thermo-osmosis based on a kinetic model with near-wall potential
• Lattice Boltzmann simulations of liquid flilm drainage between smooth surfaces