Swimming micro-machine driven by magnetic torque

K. Ishiyama, M. Sendoh, A. Yamazaki, K. I. Arai

Research output: Contribution to journalArticlepeer-review

135 Citations (Scopus)


Magnetic micro-machines capable of swimming through liquid or gel were fabricated. The micro-machines were driven by an external rotating magnetic field and featured a screw-shaped structure and permanent magnet. The machines could swim under condition of a Reynolds number (Re) of 10-7, and were able to run through agar or a bovine tissue sample using the same principle. Their running behavior was dependent on the frequency and strength of the external field, and on the surrounding media. These machines have great potential for medical applications in the human body.

Original languageEnglish
Pages (from-to)141-144
Number of pages4
JournalSensors and Actuators A: Physical
Issue number1-2
Publication statusPublished - 2001 Jun 5


  • Gel
  • Magnetic micro-machine
  • Rotating magnetic field
  • Spiral structure


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