Micro swimming mechanisms propelled by external magnetic fields

T. Honda, K. I. Arai, K. Ishiyama

Research output: Contribution to journalArticlepeer-review

193 Citations (Scopus)


A new type of micro swimming mechanism is proposed for microrobots working in water. It is composed of a small magnet attached to a spiral wire. An external alternating magnetic field causes the magnet to rotate due to magnetic torque. As a result, the mechanism can swim propelled by waves traveling along the spiral. The swimming velocity increases linearly with increasing excitation frequency, and the increasing rate depends on the shape of the spiral. The experimental velocity agreed with the calculation result based upon Lighthill's theory.

Original languageEnglish
Pages (from-to)5085-5087
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 PART 2
Publication statusPublished - 1996


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