Stability of Soft Magnetic Helical Microrobots

Nano/microrobotic swimmers have many possible biomedical applications such as drug delivery and micro-manipulation. This paper examines one of the most promising classes of these: rigid magnetic microrobots that are propelled through bulk fluid by rotation induced by a rotating magnetic field. Propu...

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Bibliographic Details
Published inFluids (Basel) Vol. 5; no. 1; p. 1
Main Authors Samsami, Kiarash, Mirbagheri, Seyed Amir, Meshkati, Farshad, Fu, Henry Chien
Format Journal Article
LanguageEnglish
Published MDPI AG 01.03.2020
Subjects
Drug delivery systems
Robots
Technology application
Iran
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Summary:Nano/microrobotic swimmers have many possible biomedical applications such as drug delivery and micro-manipulation. This paper examines one of the most promising classes of these: rigid magnetic microrobots that are propelled through bulk fluid by rotation induced by a rotating magnetic field. Propulsion corresponds to steadily rotating and translating solutions of the dynamics of such microrobots that co-rotate with the magnetic field. To be observed in experiments and be amenable to steering control, such solutions must also be stable to perturbations. In this paper, we analytically derive a criterion for the stability of such steadily rotating solutions for a microrobot made of soft magnetic materials, which have a magnetization that depends on the applied field. This result generalizes previous stability criteria we obtained for microrobots with a permanent magnetization.
ISSN:2311-5521
2311-5521
DOI:10.3390/fhuids5010019