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Issue 13, 2014
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Dynamic trapping and two-dimensional transport of swimming microorganisms using a rotating magnetic microrobot

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Abstract

Manipulation of microorganisms with intrinsic motility is a challenging yet important task for many biological and biomedical applications. Currently, such a task has only been accomplished using optical tweezers, while at the risk of averse heating and photodamage of the biological samples. Here, we proposed a new micro-robotic approach for fluidic trapping and two-dimensional transportation of motile microorganisms near a solid surface in fluids. We demonstrated selective trapping and transportation of individual freely swimming multi-flagellated bacteria over a distance of 30 μm (7.5 body length of the carrier) on a surface, using the rotational flows locally induced by a rotating magnetic microparticle. Only a weak uniform magnetic field (<3 mT) was applied to actuate the microparticle. The microparticle can translate on a glass substrate by rotating at a speed of up to 100 μm s−1, while providing a fluidic force of a few to tens of pico-Newtons.

Graphical abstract: Dynamic trapping and two-dimensional transport of swimming microorganisms using a rotating magnetic microrobot

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Publication details

The article was received on 01 Jan 2014, accepted on 12 Feb 2014 and first published on 12 Feb 2014


Article type: Paper
DOI: 10.1039/C4LC00004H
Author version available: Download Author version (PDF)
Citation: Lab Chip, 2014,14, 2177-2182
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    Dynamic trapping and two-dimensional transport of swimming microorganisms using a rotating magnetic microrobot

    Z. Ye and M. Sitti, Lab Chip, 2014, 14, 2177
    DOI: 10.1039/C4LC00004H

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