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Characterizing the swimming properties of artificial bacterial flagella

Nano Letters, ISSN: 1530-6984, Vol: 9, Issue: 10, Page: 3663-3667
2009
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Article Description

Artificial bacterial flagella (ABFs) consist of helical talis resembling natural flagella fabricated by the self-scrolling of helical nanobelts and soft-magnetic heads composed of Cr/Ni/Au stacked thin films. ABFs are controlled wirelessly using a low-strength rotating magnetic field. Self-propelled devices such as these are of interest for in vitro and in vivo biomedical applications. Swimming tests of ABFs show a linear relationship between the frequency of the applied field and the translational velocity when the frequency is lower than the step-out frequency of the ABF. Moreover, the influences of head size on swimming velocity and the lateral drift of an ABF near a solid boundary are investigated. An experimental method to estimate the propulsion matrix of a helical swimmer under a light microscope is developed. Finally, swarm-like behavior of multiple ABFs controlled as a single entity is demonstrated. © 2009 American Chemical Society.

Bibliographic Details

Zhang, Li; Abbott, Jake J; Dong, Lixin; Peyer, Kathrin E; Kratochvil, Bradley E; Zhang, Haixin; Bergeles, Christos; Nelson, Bradley J

American Chemical Society (ACS)

Chemical Engineering; Chemistry; Materials Science; Physics and Astronomy; Engineering

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