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Related Concept Videos

Other Unique Bacteria01:18

Other Unique Bacteria

183
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
183

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Free-form Light Actuators &#8212; Fabrication and Control of Actuation in Microscopic Scale
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Light- and magnetically actuated FePt microswimmers.

Vincent Mauricio Kadiri1,2, Jan-Philipp Günther1,2, Sai Nikhilesh Kottapalli1,2

  • 1Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany.

The European Physical Journal. E, Soft Matter
|June 2, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed biocompatible microswimmers using iron-platinum (FePt) alloy for targeted transport. These micropropellers are magnetically propelled and catalytically active, enabling diverse biomedical applications.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Externally controlled microswimmers are crucial for biological research and medical applications.
  • Biocompatibility and tailored propulsion mechanisms are essential for microswimmers operating in low Reynolds number environments.

Purpose of the Study:

  • To incorporate the biocompatible iron-platinum (FePt) alloy into microstructures for microswimmer applications.
  • To investigate the magnetic propulsion capabilities of FePt-enhanced micropropellers.
  • To explore the catalytic activity and multi-modal actuation of FePt-coated microswimmers.

Main Methods:

  • Utilized a one-step physical vapor deposition process to integrate low amounts of FePt alloy into microstructures.
  • Fabricated helical micropropellers utilizing the hard magnetic properties of the [Formula: see text] phase FePt.
  • Investigated light-actuation and magnetic guidance for Janus microswimmers with FePt coatings.

Main Results:

  • Successfully incorporated biocompatible [Formula: see text] FePt into microstructures.
  • Demonstrated efficient propulsion of helical micropropellers using rotating magnetic fields due to FePt's hard magnetic properties.
  • Confirmed catalytic activity of FePt coatings, enabling Janus microswimmers with dual light and magnetic actuation.

Conclusions:

  • The FePt alloy is a promising material for creating biocompatible and magnetically controllable microswimmers.
  • The hard magnetic properties of [Formula: see text] FePt are advantageous for magnetic propulsion systems.
  • FePt coatings offer versatile functionalities, including catalytic activity and multi-modal actuation for advanced microswimmer designs.