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Laser Micromachining for Polymer Surface Topography Design

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Bioinspired Magnetic-Responsive Microcolumn Arrays for Active/Passive Antifouling and Droplet Manipulation.

Mingyao Gao¹, Wei Bing², Zheng Wang²

¹School of Mechanical and Electrical Engineering, Changchun University of Science and Technology, Changchun 130025, China.

ACS Applied Materials & Interfaces

|December 7, 2025

Summary

A novel bionic magnetic-responsive microcolumn array (MMA) surface offers eco-friendly marine antifouling. This superhydrophobic surface actively disrupts biofouling via magnetic-actuated oscillations, complementing its passive antibacterial properties.

Keywords:

active/passive antifouling droplet manipulation durability and stability magnetic-responsive microcolumn array

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Area of Science:

Materials Science
Surface Engineering
Biomimetics

Background:

Marine biofouling presents significant safety risks and economic challenges.
Traditional antifouling methods often rely on toxic substances with environmental concerns.
Bioinspired surfaces offer sustainable alternatives but face limitations in cost, durability, and preparation.

Purpose of the Study:

To develop a novel bionic magnetic-responsive microcolumn array (MMA) surface for effective and eco-friendly marine antifouling.
To investigate the synergistic antifouling mechanisms of superhydrophobicity and dynamic surface deformation.
To explore the potential applications of the developed surface beyond antifouling.

Main Methods:

Fabrication of a bionic magnetic-responsive microcolumn array (MMA) surface using magnetic field-assisted and template methods.
Construction of a superhydrophobic MMA (SMMA) surface via laser etching.
Evaluation of antifouling performance through 120-hour tests against specific bacterial strains under magnetic field actuation.

Main Results:

The magnetically actuated SMMA surface demonstrated high inhibition rates against bacteria (94.08% for P. pantotrophus, 88.29% for B. subtilis).
The surface achieved dual active/passive antifouling through superhydrophobicity and dynamic microcolumn oscillations.
The SMMA surface exhibited sensitive magnetic responsiveness and enabled directional manipulation of multisubstances.

Conclusions:

The developed SMMA surface provides a cost-effective, high-efficiency, and eco-friendly solution for marine antifouling.
The bionic design offers superior antifouling performance compared to static surfaces.
Potential applications include biomedical detection, chemical reactions, and microfluidic control.