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Forming a Large-Scale Droplet Array in a Microcage Array Chip for High-Throughput Screening.

Jin-Gang Xu1, Meng-Shi Huang1, Hui-Feng Wang1

  • 1Institute of Analytical Chemistry, Department of Chemistry and Center for Chemistry of Novel & High-Performance Materials , Zhejiang University , Hangzhou , 310058 , China.

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|July 24, 2019
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Summary
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A novel microcage array chip enables rapid formation of large-scale 2D droplet arrays for high-throughput screening. This microfluidic system allows precise droplet manipulation and single-cell analysis, achieving 100% success in picking and viability assays.

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Analytical Chemistry

Background:

  • Large-scale droplet arrays are crucial for high-throughput screening and analysis in microfluidics.
  • Existing methods for droplet array formation can be slow and lack precision.

Purpose of the Study:

  • To develop a simple, rapid method for forming large-scale 2D droplet arrays.
  • To demonstrate the utility of this system for precise droplet manipulation and biological screening.

Main Methods:

  • Utilized a microcage array chip with micropillars to rapidly trap and spread oil phases, forming droplet arrays.
  • Developed a microfluidic droplet-handling robot for individual droplet retrieval.
  • Validated the system using bacterial screening for esterase activity.

Main Results:

  • Successfully formed a 2D droplet array of approximately 1,000,000 droplets within 90 seconds.
  • Achieved 100% success rate in picking individual fluorescent droplets and transferring them to culture medium.
  • Demonstrated 100% success in screening for esterase-expressing bacteria while maintaining cell viability.

Conclusions:

  • The microcage array chip offers a rapid and efficient method for generating large-scale droplet arrays.
  • The system enables precise droplet manipulation, facilitating applications like single-cell analysis and drug screening.
  • This microfluidic approach shows significant potential for advancing high-throughput biological screening.