Development and characterization of an integrated silicon micro flow cytometer

Area of Science:

• Biomedical Engineering
• Optical Physics
• Analytical Chemistry

Background:

• Traditional flow cytometers often involve complex optical configurations.
• Miniaturization of analytical devices is crucial for point-of-care diagnostics and high-throughput screening.
• Integrated optical waveguides offer potential for simplified and more efficient optical systems.

Purpose of the Study:

• To develop and characterize an innovative integrated micro flow cytometer.
• To present a novel excitation/detection system arrangement for particle and cell analysis.
• To leverage silicon hollow core antiresonant reflecting optical waveguides (ARROWs) for enhanced performance.

Main Methods:

• Hydrodynamic squeezing of sample fluid into a narrow stream using sheath flows.
• Orthogonal fluorescence detection using a collection fiber.
• Utilizing silicon hollow core antiresonant reflecting optical waveguides (ARROWs) for guiding both sample and excitation light.
• Characterization using biological samples labeled with standard fluorochromes.

Main Results:

• Demonstrated successful individual particle/cell flow through the detection region.
• Achieved simplified optical configuration by using ARROWs for both sample guiding and excitation light.
• Reported an increased signal-to-noise ratio due to the integrated optical design.
• Experimental validation confirmed the microdevice's efficacy in detecting labeled cells.

Conclusions:

• The proposed integrated micro flow cytometer based on ARROWs is a successful and innovative device.
• The novel excitation/detection system offers a simplified optical path and improved signal quality.
• This microdevice shows significant potential for sensitive and efficient cell detection in biological samples.