Start of Micrometer-Sized Oil Droplet Motion through Generation of Surfactants

Yui Kasuo, Hiroyuki Kitahata, Yuki Koyano, Masahiro Takinoue, Kouichi Asakura, Taisuke Banno

Research output: Contribution to journalArticle

Abstract

Self-propelled motion of micrometer-sized oil droplets in surfactant solution has drawn much attention as an example of nonlinear life-like dynamics under far-from-equilibrium conditions. The driving force of this motion is thought to be induced by Marangoni convection based on heterogeneity in the interfacial tension at the droplet surface. Here, to clarify the required conditions for the self-propelled motion of oil droplets, we have constructed a chemical system, where oil droplet motion is induced by the production of 1,2,3-triazole-containing surfactants through the Cu-catalyzed azide-alkyne cycloaddition reaction. From the results of the visualization and analysis of flow fields around the droplet, the motion of the droplets could be attributed to the formation of flow fields, which achieved sufficient strength caused by the in situ production of surfactants at the droplet surface.

Original languageEnglish
Pages (from-to)13351-13355
Number of pages5
JournalLangmuir
Volume35
Issue number41
DOIs
Publication statusPublished - 2019 Oct 15

ASJC Scopus subject areas

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

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