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Updated: Apr 16, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

A valve-less microfluidic peristaltic pumping method.

Xiannian Zhang¹, Zitian Chen¹, Yanyi Huang¹

¹Biodynamic Optical Imaging Center (BIOPIC), and College of Engineering, Peking University , Beijing 100871, China.

Biomicrofluidics

|March 12, 2015

Summary

This summary is machine-generated.

This study presents a novel valve-less microfluidic pump for precise nanoliter fluid delivery. The innovative peristaltic method uses rolling cams to achieve continuous flow with high accuracy and backpressure resistance.

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Area of Science:

Microfluidics
Biomedical Engineering
Mechanical Engineering

Background:

Microfluidic devices require precise fluid control for various applications.
Traditional microfluidic pumps often rely on complex valves, limiting performance and increasing fabrication costs.

Purpose of the Study:

To demonstrate a novel valve-less microfluidic peristaltic pumping method.
To achieve continuous nanoliter-scale flow with high precision and accuracy.
To explore the flexibility and potential applications of this new pumping technology.

Main Methods:

Fabrication of microfluidic channels within a poly(dimethylsiloxane) (PDMS) device.
Utilizing rolling cams or bearings to squeeze microchannels and induce peristaltic motion.
Characterizing flow rate, volume error, and backpressure resistance.

Main Results:

Achieved continuous and uniform flow with velocities ranging from 1 to 500 nl/s.
Demonstrated high precision with an outflow volume error within 3 nl.
Showcased enhanced backpressure resistance up to 340 kPa.
Exhibited flexibility in generating emulsions and plugs by altering channel layouts.

Conclusions:

The valve-less peristaltic pumping method offers a precise and continuous solution for nanoliter fluid delivery.
The developed micro-pumps are low-cost, easy to fabricate, and highly flexible.
This technology provides novel approaches for liquid actuation in diverse microfluidic applications.