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Particle-based optical pressure sensors for 3D pressure mapping
Niladri Banerjee1, Yan Xie, Sandeep Chalaseni
1Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT, USA, niladribanerjeehere@gmail.com.
Biomedical Microdevices
|September 7, 2015
Summary
New spherical microballoon particles enable accurate in-flow pressure sensing in microfluidics. This particle-based manometry overcomes orientation issues, offering a viable method for precise pressure measurements.
Area of Science:
- Optical sensing
- Microfluidics
- Materials science
Background:
- Traditional in-flow pressure sensing in microfluidic devices presents challenges.
- Previous particle-based sensors were limited by orientation-dependent measurements.
Purpose of the Study:
- To develop and validate a novel particle-based optical pressure sensor for microfluidic applications.
- To overcome limitations of previous particle designs for reliable pressure sensing.
Main Methods:
- Development of three generations of pressure-sensitive particles: flat planar, retroreflector-integrated, and spherical microballoons.
- Testing of spherical microballoon particles (12 μm radius, 0.5 μm wall thickness) in liquid media.
- Static and dynamic pressure measurements conducted over extended periods (5+ hours) from atmospheric to 40 psi.
Main Results:
- The third-generation spherical microballoon particles eliminate orientation and angle dependence.
- Accurate pressure measurements achieved in the range of atmospheric to 40 psi.
- Demonstrated effectiveness for over 5 hours with less than 5% error.
Conclusions:
- Spherical microballoon particles represent a significant advancement in particle-based optical pressure sensing.
- This technology offers a viable and efficient methodology for microfluidic manometry.
- The developed sensors provide reliable, long-term pressure monitoring in microfluidic systems.
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