Journal
LAB ON A CHIP
Volume 14, Issue 13, Pages 2177-2182Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4lc00004h
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Funding
- National Science Foundation (NSF) Cyberphysical Systems Program [CNS-1135850]
- NSF National Robotics Initiative Program [NRI-1317477]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1317477] Funding Source: National Science Foundation
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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 mu m (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 mu m s(-1), while providing a fluidic force of a few to tens of pico-Newtons.
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