Micro magnetic gyromixer for speeding up reactions in droplets

Yi Zhang, Tza Huei Wang

Research output: Contribution to journalArticlepeer-review


We report a novel micro magnetic gyromixer designed for accelerating mixing hence reactions in droplets. The gyromixer is fabricated with magnetite-PDMS composite using soft lithography. The mixer spins and balances itself on the droplet surface through the gyroscopic effect, rapidly homogenizing the enclosed reagents by stretching and folding internal fluid streamlines to enhance mixing. We examined the capability of the gyromixer for improving biochemical reactions in droplets by monitoring the biotin-streptavidin binding as a linker in a quantum dot fluorescence resonant energy transfer sensing system. The remotely controlled gyromixer exhibits high flexibility and potential for integration in a variety of droplet-based miniaturized total analysis systems to reduce turnaround times.

Original languageEnglish (US)
Pages (from-to)787-794
Number of pages8
JournalMicrofluidics and Nanofluidics
Issue number5
StatePublished - Mar 2012


  • Droplet
  • Gyromixer
  • MEMS
  • Magnetic
  • Microfluidics
  • Quantum dot

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry


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