Integration of plasmonic trapping in a microfluidic environment

Area of Science:

• Physics
• Biotechnology
• Materials Science

Background:

• Near-field plasmonic structures show potential for trapping small objects.
• Microfluidics is crucial for lab-on-a-chip (LOC) applications, enabling precise fluid handling and analysis.
• Conventional optical tweezers for cell manipulation are complex and power-intensive.

Purpose of the Study:

• To report the first integration of plasmonic trapping with microfluidics for LOC applications.
• To demonstrate the capability of this combined technique for immobilizing biological entities.
• To highlight the advantages of plasmonic trapping over conventional methods in microfluidic systems.

Main Methods:

• Fabrication of a three-layer plasmo-microfluidic chip.
• Utilizing near-field plasmonics for particle and cell manipulation within microchannels.
• Demonstrating trapping of polystyrene spheres and yeast cells.

Main Results:

• Successful integration of plasmonic trapping within a microfluidic device.
• Demonstrated immobilization of polystyrene spheres and yeast cells using the plasmo-microfluidic chip.
• Achieved cell trapping without the need for complex optical setups.

Conclusions:

• The developed plasmo-microfluidic chip enables efficient cell immobilization.
• This technique offers optical simplicity, low power consumption, and compactness for LOC devices.
• The technology holds significant potential for advanced manipulation and analytics in lab-on-a-chip systems.