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Updated: Sep 29, 2025

Chemotactic Response of Marine Micro-Organisms to Micro-Scale Nutrient Layers
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An aquatic microrobot for microscale flow manipulation.

Satishkumar Subendran1, Chun-Fang Wang1, Dineshkumar Loganathan1

  • 1Department of Mechanical Engineering, National Cheng Kung University, Tainan, 701, Taiwan.

Scientific Reports
|March 24, 2022
PubMed
Summary
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This study presents a novel aquatic microrobot built using a block-to-block technique. This design enhances control and applicability for tasks like flow manipulation in microreactors and lab-on-a-chip devices.

Area of Science:

  • Robotics
  • Microfluidics
  • Biomedical Engineering

Background:

  • Microrobots offer versatile applications but face limitations in fabrication, actuation, and precise control.
  • Existing microrobot designs often involve complex manufacturing and actuation methods, hindering widespread adoption.

Purpose of the Study:

  • To develop a novel aquatic microrobot using a building block technique for enhanced controllability and applicability.
  • To demonstrate the microrobot's capabilities in flow manipulation and dissolution testing for microreactor and lab-on-a-chip applications.

Main Methods:

  • A block-to-block fabrication approach was employed for microrobot construction.
  • An in-house electromagnetic system and a custom control algorithm were developed for precise real-time dynamics.

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  • Magnetic intensity simulations were used to verify control parameters and actuating waveforms.

    • Main Results:

    • The microrobot demonstrated high-efficiency flow manipulation through trajectory planning and rotation control.
    • A dissolution test confirmed the microrobot's on-demand flow agitation capabilities.
    • Detailed dynamic analysis provided insights into microrobot control and functionality.

    Conclusions:

    • The developed aquatic microrobot offers improved control and broader applicability compared to existing designs.
    • The building block technique and advanced control system pave the way for next-generation microfluidic and lab-on-a-chip applications.
    • This engineering perspective on microrobot control presents significant potential for future advancements.