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Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

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Published on: February 4, 2011

Smarter cell sorting: droplet microfluidics meets pick-and-place sorting.

Olivia Gerhard¹, Steffen Schneider¹, Michaela Dehne^2,3

¹Institute for Chemistry and Biotechnology, Chair Physical Chemistry and Microreaction Technology, Technische Universität Ilmenau, 98693 Ilmenau, Germany. jialan.cao@tu-ilmenau.de.

|November 10, 2025

Summary

This study introduces a microfluidic droplet system for faster cell sorting. The microfluidic transfer tool (MTT) significantly improves pick-and-place efficiency for single-cell manipulation in screening applications.

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Area of Science:

Biotechnology
Microfluidics
Robotics

Background:

Single-cell manipulation is crucial for morphology-based screening.
Current pick-and-place methods are limited by single-object transfer per cycle, impacting efficiency.

Purpose of the Study:

To develop a novel microfluidic droplet-based system for efficient, multi-object single-cell transfer.
To overcome the bottleneck of traditional single-object pick-and-place techniques.

Main Methods:

Development of a microfluidic transfer tool (MTT) for sequential cell encapsulation into nanoliter droplets.
Integration of the MTT into a robotic environment for automated pick-and-place operations.
Benchmarking using fluorescent particles of varying colors and sizes (45-63 μm).

Main Results:

The microfluidic droplet system enables sequential transfer of multiple objects per cycle.
Demonstrated an approximate 20-fold performance improvement compared to traditional methods.
Successful demonstration of hit-containing droplet transfer from source to target with a single global movement.

Conclusions:

The microfluidic transfer tool (MTT) offers a significant advancement in single-cell manipulation efficiency.
This droplet-based approach enhances throughput for screening applications.
The system provides a robust and scalable solution for automated cell sorting and transfer.