Bubble colloidal AFM probes formed from ultrasonically generated bubbles

Ivan U. Vakarelski, Judy Lee, Raymond R. Dagastine*, Derek Y.C. Chan, Geoffrey W. Stevens, Franz Grieser

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Here we introduce a simple and effective experimental approach to measuring the interaction forces between two small bubbles (̃80-140 μm) in aqueous solution during controlled collisions on the scale of micrometers to nanometers. The colloidal probe technique using atomic force microscopy (AFM) was extended to measure interaction forces between a cantilever-attached bubble and surface-attached bubbles of various sizes. By using an ultrasonic source, we generated numerous small bubbles on a mildly hydrophobic surface of a glass slide. A single bubble picked up with a strongly hydrophobized V-shaped cantilever was used as the colloidal probe. Sample force measurements were used to evaluate the pure water bubble cleanliness and the general consistency of the measurements.

Original languageEnglish (US)
Pages (from-to)603-605
Number of pages3
JournalLangmuir
Volume24
Issue number3
DOIs
StatePublished - Feb 5 2008

ASJC Scopus subject areas

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

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