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Related Concept Videos

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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...
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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Updated: Oct 18, 2025

Bioinspired Soft Robot with Incorporated Microelectrodes
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Bioinspired soft microrobots actuated by magnetic field.

Yuwen Gao1, Fanan Wei2, Yin Chao1

  • 1School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, China.

Biomedical Microdevices
|October 2, 2021
PubMed
Summary

Soft microrobots offer advantages over traditional robots, with magnetic fields providing solutions for energy and control. This review explores their design, fabrication, and biomedical applications.

Keywords:
BioinspiredMagnetic fieldSoft microrobot

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Area of Science:

  • Biomimetic Robotics
  • Soft Materials Science
  • Magnetic Actuation

Background:

  • Traditional robots require rigid materials and complex joints, limiting their use in delicate applications.
  • Miniaturization of microrobots presents challenges in energy supply and precise control.
  • Magnetic field actuation offers a promising solution for controlling soft microrobots.

Purpose of the Study:

  • To review the latest advancements in biomimetic soft microrobots actuated by magnetic fields.
  • To summarize materials, fabrication methods, and design structures of these microrobots.
  • To present current and potential applications in biomedicine and environmental remediation.

Main Methods:

  • Overview of soft and magnetic materials used in soft microrobot fabrication.
  • Summary of various fabrication techniques and design structures for magnetic soft microrobots.
  • Presentation of applications in targeted therapy, surgical operations, and microscopic object transportation.

Main Results:

  • Soft microrobots actuated by magnetic fields demonstrate significant potential for minimally invasive surgery and targeted drug delivery.
  • Review covers diverse fabrication methods and design strategies tailored for soft microrobot functionality.
  • Applications span biomedicine, including targeted therapy and surgical interventions, and environmental remediation.

Conclusions:

  • Magnetic actuation is a key enabling technology for overcoming control and energy challenges in soft microrobots.
  • Biomimetic soft microrobots show great promise for advanced applications in medicine and environmental science.
  • Further research into magnetic soft microrobots is encouraged to address current challenges and explore future trends.