Three dimensional microfluidics with embedded microball lenses for parallel and high throughput multicolor...

Area of Science:

• Microfluidics
• Optical Detection
• Biotechnology

Background:

• Traditional microfluidic devices face challenges in achieving high throughput and sensitivity for multicolor fluorescence detection.
• Integrating optical components within microfluidic systems is complex, limiting parallel processing capabilities.

Purpose of the Study:

• To develop a 3D microfluidic device with integrated microball lenses for high-throughput, multicolor fluorescence detection.
• To enhance sensitivity and parallel processing in cell analysis using advanced microfluidic and optical designs.

Main Methods:

• Fabrication of a 3D microfluidic device with 32 detection and 64 sheath flow channels using polydimethylsiloxane (PDMS).
• Embedding high refractive index (n=2.1) solid immersion microball lenses beneath channels for enhanced light collection.
• Utilizing 3D microfluidic architecture for efficient fluid routing and parallel sheath focusing.

Main Results:

• Achieved a record throughput of 358,400 cells per second.
• Demonstrated high sensitivity and parallel multicolor fluorescence detection capabilities.
• Enabled simultaneous pumping of 32 sample and 64 sheath flow channels with only two inlets.

Conclusions:

• The developed 3D microfluidic device with embedded microball lenses offers a compact and efficient platform for high-throughput cell analysis.
• This technology significantly advances multicolor fluorescence detection, enabling faster and more sensitive biological sample analysis.
• The innovative design addresses fluidic and optical integration challenges in microfluidic systems.