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dDrop-Chip: disposable film-chip microfluidic device for real-time droplet feedback control.

Jaewook Ryu1, Junhyeong Kim1, Ki-Ho Han1

  • 1Department of Nanoscience and Engineering, Center for Nano Manufacturing, Inje University, 197, Inje-Ro, Gimhae 50834, Gyeongnam, Republic of Korea. mems@inje.ac.kr.

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Summary

This study presents a disposable microfluidic device (dDrop-Chip) for automated, real-time control of droplet size and production rate. The dDrop-Chip ensures high-throughput, stable, and uniform droplet generation, crucial for various applications.

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Chemical Engineering

Background:

  • High-throughput, stable, and uniform droplet generation is essential for many scientific applications.
  • Existing methods often lack real-time feedback control, leading to inconsistencies in droplet size and production rate.
  • A cost-effective, automated solution is needed for precise droplet generation.

Purpose of the Study:

  • To introduce a disposable droplet generation microfluidic device (dDrop-Chip) for simultaneous real-time control of droplet size and production rate.
  • To demonstrate the device's capability for automated, feedback-controlled droplet generation.
  • To highlight the advantages of disposability and cost-effectiveness in microfluidic device design.

Main Methods:

  • Development of a disposable microfluidic device (dDrop-Chip) with integrated droplet and flow sensors.
  • Assembly of the device using a reusable sensing substrate and a disposable microchannel via vacuum pressure.
  • Implementation of a real-time feedback control system to regulate droplet size and production rate.

Main Results:

  • The dDrop-Chip successfully generated monodisperse droplets with consistent size (219.36 ± 0.08 μm, CV 0.036%) and production rate (32.38 ± 0.48 Hz) using real-time feedback control.
  • Without feedback control, significant deviations in droplet length (224.18 ± 6.69 μm, CV 2.98%) and production rate (33.94 ± 1.72 Hz) were observed.
  • The disposable nature of the chip prevents contamination and reduces manufacturing costs through film-chip techniques.

Conclusions:

  • The dDrop-Chip offers a reliable, cost-effective, and automated solution for real-time control of droplet generation.
  • The device ensures high precision and uniformity in droplet size and production rate, outperforming non-feedback systems.
  • The dDrop-Chip is well-suited for diverse droplet-based applications requiring controlled and consistent droplet production.