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Related Experiment Video

Updated: Jun 10, 2026

Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light
10:26

Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light

Published on: August 17, 2017

Imaging based optofluidic air flow meter with polymer interferometers defined by soft lithography.

Wuzhou Song1, Demetri Psaltis

  • 1Optics Laboratory, School of Engineering, Swiss Federal Institute of Technology Lausanne EPFL, CH-1015 Lausanne, Switzerland. wuzhou.song@epfl.ch

Optics Express
|August 20, 2010
PubMed
Summary

This study introduces an optofluidic chip using polymer interferometers to measure microfluidic air pressure and flow rate. The device offers a simple, versatile method for on-chip air pressure and flow sensing.

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Area of Science:

  • Optofluidics
  • Microfluidics
  • Optical Sensing

Background:

  • Accurate measurement of microfluidic air pressure and flow is crucial for various applications.
  • Existing methods may lack integration or versatility for on-chip measurements.

Purpose of the Study:

  • To develop an integrated optofluidic chip for simultaneous measurement of microfluidic air pressure and flow rate.
  • To demonstrate the chip's capability for in situ sensing.

Main Methods:

  • Fabrication of an optofluidic chip using soft lithography with integrated polymer interferometers and optical cavities.
  • Utilizing interference patterns from optical cavities to determine microfluidic air pressure.
  • Calculating air flow rate from differential pressure measurements across a microfluidic Venturi circuit.

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Last Updated: Jun 10, 2026

Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light
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Main Results:

  • Successful demonstration of air flow rate measurement in the range of 0-2 mg/second.
  • The optofluidic chip effectively measures both microfluidic air pressure and flow rate.
  • The device enables in situ, on-chip sensing capabilities.

Conclusions:

  • The presented optofluidic chip offers a simple and versatile platform for microscale air pressure and flow measurement.
  • Integrated polymer interferometers provide a novel approach for optofluidic sensing.
  • This technology has potential for applications requiring precise microfluidic control and monitoring.