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A Programmable and Portable Electromagnetic Microfluidic Platform for Droplet Manipulation.

Chaoze Xue1, Shilun Feng2, Wenshuai Wu3

  • 1School of Microelectronics, Shanghai University, Shanghai 201899, China.

Biosensors
|April 27, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a portable, low-power electromagnetic microfluidic platform for precise droplet control. The system enables efficient bio-microfluidic applications, including diagnostics and drug delivery, with minimal energy consumption.

Keywords:
droplet manipulationelectromagnetic control systemmagnetic digital microfluidicsportableprogrammable

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Area of Science:

  • Bio-microfluidics
  • Magnetic Digital Microfluidics (MDMF)
  • Electromagnetic Actuation

Background:

  • Droplet manipulation is crucial for bio-microfluidic applications like medical diagnostics and drug delivery.
  • Magnetic Digital Microfluidics (MDMF) offers advantages but is limited by bulky equipment and high power needs for in-field use.
  • Conventional MDMF requires significant power and instrumentation, hindering portable applications.

Purpose of the Study:

  • To develop a programmable, portable electromagnetic microfluidic droplet manipulation platform.
  • To enable non-contact, high-precision droplet control using integrated static and dynamic magnetic fields.
  • To achieve ultra-low power consumption for enhanced in-field and point-of-care applications.

Main Methods:

  • Integration of an electromagnetic actuation module, permanent magnet, and Teflon-coated glass substrate.
  • Utilized a PMMA support structure fabricated via milling for reusability and reproducibility.
  • Implemented control logic on a Field-Programmable Gate Array (FPGA) for autonomous battery-powered operation.

Main Results:

  • Achieved robust manipulation of 0.5–5 μL droplets at ultra-low power (0.63 W).
  • Demonstrated a maximum average droplet velocity of 0.6 cm/s with a positioning deviation of ~0.1 mm.
  • Platform operates at 3.5 V and 180 mA, showcasing energy efficiency and stability.

Conclusions:

  • The developed platform provides a scalable, energy-efficient solution for portable droplet-based assays.
  • Significant promise for integration into point-of-care diagnostic tools and field-ready biochemical analysis.
  • High operational stability, reproducibility, and reliable fabrication process validated through experiments.