Home List of Titles Measurement of dynamical forces between deformable drops using the atomic force microscope I: theory
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190510
- Measurement of dynamical forces between deformable drops using the atomic force microscope I: theory
- Carnie, Steven L.; Chan, Derek Y. C.; Lewis, Craig; Manica, Rogerio; Dagastine, Raymond R.
- Recent experimental developments have enabled the measurement of dynamical forces between two moving liquid drops in solution using an atomic force microscope (AFM). The drop sizes, interfacial tension, and approach velocities used in the experiments are in a regime where surface forces, hydrodynamics, and drop deformation are all significant. A detailed theoretical model of the experimental setup which accounts for surface forces, hydrodynamic interactions, droplet deformation, and AFM cantilever deflection has been developed. In agreement with experimental observations, the calculated force curves show pseudo-constant compliance regions due to drop flattening, as well as attractive pull-off forces due mainly to hydrodynamic lubrication forces.
- Publication type
- Journal article
- Langmuir, Vol. 21, no. 7 (Mar 2005), pp. 2912-2922
- Publication year
- FOR Code(s)
- 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
- Atomic force microscopy; Brownian movement; Buoyancy; Deformation; Drag; Drop breakup; Free energy; Geometry; Hydrodynamics; Mathematical models; Surface active agents; Surface tension; Thin films; Velocity control; Viscosity; Deformable drops; Droplet deformation; Dynamical forces; Hydrodynamic repulsion; Force measurement
- American Chemical Society
- Publisher URL
- Copyright © 2005 American Chemical Society.
- Peer reviewed