Lateral hydrodynamic interactions between an emulsion droplet and a flat surface evaluated by frictional force microscopy

Ivan Uriev Vakarelski, Raymond R. Dagastine, Derek Y.C. Chan, Geoffrey W. Stevens, Ko Higashitani, Franz Grieser

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

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 between soft matter materials relevant to a large number of applications in areas as diverse as flavor delivery in foods to the applications of emulsions or emollients in personal care products.

Original languageEnglish (US)
Pages (from-to)8002-8007
Number of pages6
JournalLangmuir
Volume26
Issue number11
DOIs
StatePublished - Jun 1 2010

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this