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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

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Push pull microfluidics on a multi-level 3D CD.

Tzer Hwai Gilbert Thio¹, Fatimah Ibrahim, Wisam Al-Faqheri

¹Medical Informatics & Biological Micro-electro-mechanical Systems (MIMEMS) Specialized Laboratory, Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.

|June 19, 2013

Summary

This summary is machine-generated.

A new thermo-pneumatic (TP) push and pull pumping method enables bidirectional fluid control on microfluidic compact discs (CDs). This innovative technique utilizes a multi-level 3D CD design and localized heating for efficient, space-saving fluid handling.

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Area of Science:

Microfluidics
Biotechnology
Lab-on-a-chip technology

Background:

Traditional thermo-pneumatic (TP) pumping on microfluidic compact discs (CDs) is unidirectional and space-inefficient.
Existing methods suffer from limited fluid control and proximity heating issues.

Purpose of the Study:

To introduce a novel thermo-pneumatic (TP) push and pull pumping method for bidirectional fluid control.
To address space and heating limitations of previous TP pumping techniques.
To demonstrate advanced applications of this new pumping method.

Main Methods:

Development of a multi-level 3D CD design to separate TP features from microfluidic processes.
Implementation of localized forced convection heating instead of infrared or laser heating.
Investigation of CD surface heating for improved TP pumping.
Demonstration of valve-less switch pumping using pull pumping.

Main Results:

The novel TP push and pull method allows for pumping of liquid in any direction between two connected chambers.
The multi-level 3D CD design enhances space efficiency and provides heat shielding for microfluidic processes.
Localized forced convection heating enables TP pumping during CD spinning and simplifies thermal management.
Successful demonstration of valve-less switch pumping.

Conclusions:

The developed TP push and pull pumping method offers versatile, bidirectional fluid control on microfluidic CDs.
The multi-level 3D CD architecture and localized heating significantly improve upon previous designs.
This technology holds promise for advanced microfluidic applications, including valve-less switching.