Journal article

Lateral Hydrodynamic Interactions between an Emulsion Droplet and a Flat Surface Evaluated by Frictional Force Microscopy

Ivan U Vakarelski, Raymond R Dagastine, Derek YC Chan, Geoffrey W Stevens, Ko Higashitani, Franz Grieser

Langmuir | AMER CHEMICAL SOC | Published : 2010

Abstract

We introduce a lateral atomic force microscopy (AFM) method to measure the hydrodynamic drag force acting on a microscopic emulsion droplet moving parallel to a flat surface. A tetradecane oil droplet formed in an aqueous solution of sodium dodecylsulfate was attached to a V-shaped atomic force microscopy cantilever, and lateral hydrodynamic interactions between the droplet and a flat glass surface were measured using a range of scanning velocities. The droplet was positioned either far from the oscillating surface or was pressed to the surface under a constant applied load. These measurements demonstrate the feasibility of using AFM to study lateral hydrodynamic interactions and lubricity b..

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Grants

Awarded by Japan Society for the Promotion of Science


Funding Acknowledgements

This work is supported in part by the Australian Research Council through funding of the Particulate Fluids Processing Centre and the Australian Minerals Science Research Institute. We also acknowledge the financial support of the Core-to-Core Program promoted by the Japan Society for the Promotion of Science (project no. 18004).