Journal
NANO LETTERS
Volume 9, Issue 10, Pages 3663-3667Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl901869j
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Funding
- Swiss National Science Foundation (SNSF)
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Artificial bacterial flagella (ABFs) consist of helical tails 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.
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