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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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Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Published on: July 4, 2017

Magnetoelectric Polymer Membrane-Based Electrical Microenvironment with Magnetically Controlled Antibacterial

Shanshan Lai^1,2, Yanjiao Wang^1,2, Yuanyuan Wan^1,2

¹School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China.

ACS Applied Materials & Interfaces

|April 19, 2022

Summary

A novel magnetoelectric coating on stainless steel creates an adjustable electrical environment for effective antibacterial action. This smart coating, activated by magnetic fields, disrupts bacterial cell functions, offering a new disinfection method for food processing.

Keywords:

antibacterial electric field electrical stimulation food processing magnetoelectric polymer

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Last Updated: Sep 26, 2025

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Published on: July 4, 2017

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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

Area of Science:

Materials Science
Biotechnology
Electrochemistry

Background:

Disinfection of hard-to-clean food processing equipment is challenging.
Chemical surface modification is complex and difficult.
Electrical environments show potential for disinfection.

Purpose of the Study:

To develop a smart electroactive coating for stainless steel.
To create an adjustable electrical environment for antibacterial properties.
To investigate the antibacterial mechanism of the coating.

Main Methods:

Developed a TbDyFe alloy/poly(vinylidene fluoride-trifluoroethylene) magnetoelectric coating.
Applied varying magnetic field intensities (0-1800 Oe) to activate the coating.
Assessed antibacterial effects and investigated mechanisms (ROS, cell respiration, membrane potential).

Main Results:

The polarized coating on stainless steel (P-CS) demonstrated antibacterial effects, peaking at 1800 Oe.
A microelectric field on P-CS generated reactive oxygen species (ROS) and OH-.
Electrical stimulation disrupted bacterial ATP synthesis and induced membrane potential hyperpolarization in E. coli.

Conclusions:

Magnetoelectric coatings provide an adjustable surface potential for stainless steel.
This technology enables magnetically controlled antibacterial effects.
The study elucidates the mechanism of electrical stimulation-induced bacterial death.