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High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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Optically driven Archimedes micro-screws for micropump application.

Chih-Lang Lin1, Guy Vitrant, Michel Bouriau

  • 1Institute of Biomedical Engineering and Material, Central Taiwan University of Science and Technology, Taichung, Taiwan. cllin101943@ctust.edu.tw

Optics Express
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created tiny Archimedes micro-screws using advanced 3D printing. These micro-devices can be optically rotated to pump fluids at low flow rates, demonstrating novel optofluidic applications.

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Area of Science:

  • Optofluidics
  • Microfabrication
  • Photonics

Background:

  • Microfluidic devices are crucial for lab-on-a-chip systems.
  • Optical manipulation offers precise control over microscale objects.
  • Developing efficient micro-pumps is essential for microfluidic applications.

Purpose of the Study:

  • To fabricate and characterize Archimedes micro-screws for optofluidic applications.
  • To demonstrate optical manipulation and rotation of micro-screws.
  • To investigate the photo-driven micropump action.

Main Methods:

  • Three-dimensional two-photon polymerization was used for fabrication.
  • A Nd:YAG Q-switched microchip laser at 532nm was employed.
  • Optical tweezers were utilized for manipulation and rotation.

Main Results:

  • Micro-screws achieved rotation rates up to 40 Hz (0.2 Hz/mW).
  • A photo-driven micropump action was demonstrated in a microfluidic channel.
  • Flow rate achieved was 6 pL/min.

Conclusions:

  • Archimedes micro-screws are viable for optofluidic manipulation.
  • Optical rotation can drive micropump action.
  • Momentum conservation governs the optofluidic properties.