Apparent microrheology of oil - Water interfaces by single-particle tracking

Jian Wu, Lenore L. Dai

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

We investigate the dynamics of charged microparticles at polydimethylsiloxane (oil)-water interfaces using Pickering emulsions as an experimental template. The mobility of the charged particles depends largely on the viscoelastic properties of the oil phase and the wettability of the solid particles. In addition, we have explored the potential of developing microrheology at liquid-liquid interfaces from the single-particle tracking technique. The apparent loss modulus, storage modulus, and relaxation time of the oil-water interfaces obtained from singe-particle microrheology depend strongly on the surface nature of the tracer particles, especially when the oil phase is viscoelastic.

Original languageEnglish (US)
Pages (from-to)4324-4331
Number of pages8
JournalLangmuir
Volume23
Issue number8
DOIs
StatePublished - Apr 10 2007
Externally publishedYes

ASJC Scopus subject areas

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

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