Influence of asymmetry and driving forces on the propulsion of bubble-propelled catalytic micromotors

Masayuki Hayakawa, Hiroaki Onoe, Ken H. Nagai, Masahiro Takinoue

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Bubble-propelled catalytic micromotors have recently been attracting much attention. A bubble-propulsion mechanism has the advantage of producing a stronger force and higher speed than other mechanisms for catalytic micromotors, but the nature of the fluctuated bubble generation process affects the motions of the micromotors, making it difficult to control their motions. Thus, understanding of the influence of fluctuating bubble propulsion on the motions of catalytic micromotors is important in exploiting the advantages of bubble-propelled micromotors. Here, we report experimental demonstrations of the bubble-propelled motions of propeller-shaped micromotors and numerical analyses of the influence of fluctuating bubble propulsion on the motions of propeller-shaped micromotors. We found that motions such as trochoid-like motion and circular motion emerged depending on the magnitude or symmetricity of fluctuations in the bubble-propulsion process. We hope that those results will help in the construction and application of sophisticated bubble-propelled micromotors in the future.

Original languageEnglish
Article number229
JournalMicromachines
Volume7
Issue number12
DOIs
Publication statusPublished - 2016

Keywords

  • Active matter
  • Bubble propulsion
  • Complex-shaped multi-compartmental microgels
  • Complex-shaped multi-compartmental microparticles
  • Self-propelled micromotors

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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