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High-precision digital droplet pipetting enabled by a plug-and-play microfluidic pipetting chip
1Department of Precision Machinery & Precision Instrumentation, University of Science & Technology of China, Hefei, Anhui 230027, China. bqli@ustc.edu.cn.
Lab on a Chip
|July 18, 2018
Summary
A novel digital droplet pipetting system offers high-precision, low-volume liquid handling for biomedical applications. This portable device uses a microfluidic chip for accurate nanoliter dispensing, improving on traditional methods.
Area of Science:
- Biomedical Engineering
- Microfluidics
- Analytical Chemistry
Background:
- Growing need for precise handling of minute liquid samples in medical and biological research.
- Limitations of existing low-volume liquid handling solutions in terms of precision, ease-of-use, and portability.
Purpose of the Study:
- Introduce a new digital droplet pipetting method based on microfluidic impact printing.
- Develop a portable, handheld device for on-demand dispensing of nanoliter droplets.
- Enhance precision and reduce liquid handling variability in low-volume applications.
Main Methods:
- Development of a plug-and-play, disposable microfluidic pipetting chip.
- Utilizing a programmable electromagnetic actuator for droplet dispensing.
- Micro-fabrication of a super-hydrophobic printing nozzle using femtosecond laser technology.
Main Results:
- Achieved a significant reduction in dispensed volume variation from 49.5% to 0.6% at 0.1 μL.
- Demonstrated the capability for on-demand nanoliter droplet dispensing.
- Successfully performed proof-of-concept studies in concentration dilution and cell drug resistance analysis.
Conclusions:
- The digital droplet pipetting system offers a high-precision, low-volume liquid handling solution.
- The portable and user-friendly design makes it suitable for diverse biomedical applications.
- This technology has the potential to significantly advance research requiring accurate micro-volume liquid manipulation.
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