Microfluidic Chip Droplet Encapsulation for Viable Single-Cell Export
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Solution Overview
Problem
Current methods for single-cell analysis face challenges in capturing, isolating, and transferring cells from microfluidic chips to external test tubes without causing damage or pollution, particularly in high-throughput applications like flow cytometry.
Innovation Solution
A microfluidic chip design with a cover layer and substrate layer, featuring a sample channel, detection cell, and oil storage well, allows for the formation and exportation of single microparticle-encapsulated droplets using optical tweezers and magnetic tweezers for capture, and capillary tubes for export, ensuring minimal cell damage and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flow cytometry is used for single-cell analysis, then detection throughput is improved, but cell transfer to external test tubes becomes difficult and causes cell damage
Solution Approach 1:
The patent embeds the microfluidic chip inside a larger external test tube, creating a nested structure where the chip is positioned within the test tube. This allows the test tube to serve dual purposes: as both the containment vessel for the microfluidic system and as the external collection vessel for exported cells, eliminating the need for separate transfer operations and maintaining cell viability throughout the process
Solution Approach 2:
The patent introduces a transfer channel as an intermediary structure that directly connects the microfluidic chip to the external test tube. This transfer channel serves as a mediator that enables seamless cell export from the chip to the test tube without requiring manual intervention or intermediate transfer steps, thereby preventing cell damage and maintaining high viability
2Measurement precision
If array capture method is used for single-cell analysis, then real-time monitoring is improved, but throughput becomes low
Solution Approach 1:
The patent designs the microfluidic chip to perform multiple functions simultaneously: it serves as both the detection platform for real-time monitoring and the export platform for high-throughput cell transfer. The integrated design allows the same chip structure to support both analytical functions (monitoring) and operational functions (export), resolving the contradiction between precision and productivity
3Adaptability or versatility
If single-cell transfer from chip to test tube is performed, then downstream analysis is enabled, but cell damage and pollution occur
Solution Approach 1:
The patent extracts the essential function of cell transfer from the complex process of manual pipetting and handling. By incorporating a dedicated transfer channel that directly connects the chip to the test tube, the system extracts and automates the transfer step, eliminating the need for external manual intervention and thereby preventing cell damage and contamination that would occur during manual transfer operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables fast and efficient single-cell selection, isolation, and exportation with high viability, suitable for downstream analyses like sequencing, and reduces operational costs by reusability of the chip.
Implementation Method 1
utilizing microfluidic chips, which can be used for such fields as single-cell sorting, single-cell isolation
Implementation Method 2
A microfluidic chip design with a cover layer and substrate layer, featuring a sample channel, detection cell, and oil storage well, allows for the formation and exportation of single microparticle-encapsulated droplets using optical tweezers and magnetic tweezers for capture
Implementation Method 3
and capillary tubes for export, ensuring minimal cell damage and contamination
Implementation Method 4
Method for forming and respectively exporting droplet wrapping single particle in micro-fluidic chip
Data Source
AI summary
A micro-fluidic chip that can be used for screening a single particle and forming and exporting a droplet wrapping same. The micro-fluidic chip is connected to a liquid sample introduction apparatus, and can constitute a micro-fluidic chip apparatus for forming a droplet for wrapping a single particle. The micro-fluidic chip apparatus can further constitute, with a particle capture apparatus, a micro-fluidic operating system for forming a droplet wrapping a single particle. Further provided is a method for forming and respectively exporting a droplet wrapping a single particle in a micro-fluidic chip.