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Other Unique Bacteria

Other Unique Bacteria

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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Related Experiment Video

Updated: Jan 10, 2026

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

Soft magnetic microrobots with remote sensing and communication capabilities.

Quan Gao¹, Minsoo Kim², Denis von Arx¹

¹Multi-Scale Robotics Lab, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland.

Nature Communications

|November 25, 2025

Summary

This summary is machine-generated.

Soft microrobots with flexible electronics enable remote communication and sensing. Shape-changing capabilities allow for remote detection and environmental monitoring, enhanced by collective robot behavior.

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Area of Science:

Materials Science
Robotics
Electrical Engineering

Background:

Remote communication is crucial for microrobot functionality, but integration of communication tools like antennas is difficult.
Conventional manufacturing techniques pose challenges for incorporating advanced features into microrobots.

Purpose of the Study:

To propose a novel concept integrating shape-reconfigurable soft microrobots with flexible electronics for remote communication.
To demonstrate a scalable and adaptable approach for microrobotic sensing applications using photolithography.

Main Methods:

Developed a three-layered microrobot design incorporating a thermoresponsive magnetic hydrogel, anisotropic support structure, and flexible dipole antenna.
Utilized photolithography processes for fabrication, enabling scalability and adaptability.
Investigated the shape transformation from helical to planar based on temperature changes.

Main Results:

The microrobot successfully demonstrated remote shape-state recognition and environmental temperature sensing via external radio receivers.
Shape transformation from helical (low-temperature) to planar (high-temperature) was achieved and remotely detectable.
Collective behavior of multiple microrobots was shown to enhance signal recognition performance.

Conclusions:

The proposed concept advances the co-engineering of smart materials and flexible electronics for microrobotic applications.
This approach enables microrobotic embodied intelligence, integrating environmental monitoring, magnetic navigation, and remote signaling.
The technology offers a scalable solution for advanced microrobot communication and sensing capabilities.