Related Experiment Video
Updated: Apr 6, 2026
18:11
Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
Published on: October 1, 2007
22.0K
Microfluidic reflow pumps
Bryan Haslam1, Long-Fang Tsai1, Ryan R Anderson1
1Electrical and Computer Engineering Department, Brigham Young University , Provo, Utah 84602, USA.
Biomicrofluidics
|July 30, 2015
Summary
A novel reflow pump efficiently moves small fluid volumes for faster sensor analysis. This microfluidic device enhances analyte flux, reducing response times in lab-on-a-chip systems.
Area of Science:
- Microfluidics
- Biomedical Engineering
- Sensor Technology
Background:
- Microfluidic devices require efficient sample handling for rapid analysis.
- Minimizing sensor response time is crucial for high-throughput diagnostics.
- Convection-enhanced analyte transport can improve sensor performance.
Purpose of the Study:
- To design and characterize a novel microfluidic reflow pump.
- To investigate the operational properties of reflow pumps for sub-microliter sample volumes.
- To optimize reflow pump performance for enhanced analyte flux to sensor surfaces.
Main Methods:
- Fabrication of two-layer and three-layer polydimethylsiloxane (PDMS) reflow pumps.
- Pneumatic actuation of reservoirs to control fluid movement.
- Analysis of volumetric flow rates and sample recovery efficiency.
- Integration of the reflow pump with a microcantilever sensor array.
Main Results:
- Demonstrated reflow pumps operating with sub-microliter sample volumes.
- Achieved average volumetric flow rates up to 500 μl/min with a three-layer pump.
- Showcased up to 93% sample volume recovery per half period with a two-layer design.
- Successfully integrated the reflow pump with a microcantilever array for flow rate measurement.
Conclusions:
- Reflow pumps offer an efficient method for manipulating small sample volumes in microfluidic systems.
- Optimized actuation parameters can significantly enhance volumetric flow rates.
- The reflow pump design effectively maximizes analyte flux, leading to reduced sensor response times.
