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Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
Published on: February 22, 2016
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A centrifugal microfluidic pressure regulator scheme for continuous concentration control in droplet-based
Yuye Wang1, Shiyue Liu2, Tiankai Zhang3
1Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China. aaron.ho@cuhk.edu.hk.
Lab on a Chip
|October 23, 2019
Summary
This study introduces a novel centrifugal microfluidic system for precise droplet generation and fusion, enhancing applications in cell transfection and chemical synthesis with improved efficiency and control.
Area of Science:
- Microfluidics
- Biotechnology
- Chemical Synthesis
Background:
- Droplet microfluidics offers advantages in biological and chemical applications like digital polymerase chain reaction (PCR) and in vitro diagnosis due to small sample volumes and adjustable droplet properties.
- Centrifugal microfluidics is established for droplet generation, but manipulation and reactions require further development.
Purpose of the Study:
- To develop a microfluidic pressure regulator scheme for controlled droplet generation and fusion using centrifugal force.
- To demonstrate fine control over droplet properties and reactions through varying rotational frequency and specialized fusion devices.
Main Methods:
- Implementation of a microfluidic pressure regulator with microcapillaries for periodic droplet generation.
- Utilization of centrifugal force for droplet manipulation and fusion, including symmetric and asymmetric fusion devices.
- Application of the system for cell transfection and synthesis of quasi-2D perovskites.
Main Results:
- Achieved fine control over droplet generation and fusion by adjusting rotational frequency.
- Demonstrated improved transfection efficiency in cell-based assays compared to bulk methods.
- Successfully synthesized quasi-2D perovskites with controllable compositions and tunable photoluminescence, validating nano-liter volumetric accuracy.
Conclusions:
- The centrifugal force actuation scheme provides a compact and highly parallel alternative to pressure pulsation for droplet microfluidics.
- This technique offers significant potential for advancements in cell biology, chemical synthesis, and high-throughput screening.
