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December 17, 2010Journal of the American Chemical Society204 citations

Microbots Swimming in the Flowing Streams of Microfluidic Channels

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SSSamuel SánchezASAlexander A. SolovevSHStefan M. Harazim

Key Points

  • To evaluate the propulsion mechanism, magnetic steerability, and cargo-transport capabilities of self-propelled catalytic microtubes within flowing microfluidic channels.
  • Fabricated self-propelled catalytic microbots using rolled-up titanium/iron/platinum (Ti/Fe/Pt) microtubes.
  • Tracked microbot propulsion and cargo handling in microfluidic channels under applied external magnetic fields and opposing fluid flow.
  • Demonstrated precise steering and navigation of catalytic microbots using weak external magnetic fields.
  • Achieved autonomous upstream propulsion against fluid streams and directed transport of multiple spherical microparticles to target locations.

Abstract

We describe the motion of self-propelled catalytic Ti/Fe/Pt rolled-up microtubes (microbots) in the microchannels of a microfluidics system. Their motion is precisely controlled by a small magnetic field, and the transport of multiple spherical microparticles into desired locations is achieved. The microbots are powerful enough to propel themselves against flowing streams. The integration of “smart and powerful” microbots into microchip systems can lead to multiple lab-on-a-chip functions such as separation of cells and biosensing.

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Cite This Study

Sánchez et al. (2010) studied this question.

synapsesocial.com/papers/69fcab90312cc879b3dd9e8ehttps://doi.org/10.1021/ja109627w
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