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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

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Published on: October 1, 2007

Cilia metasurfaces for electronically programmable microfluidic manipulation.

Wei Wang^1,2, Qingkun Liu³, Ivan Tanasijevic⁴

¹Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, USA. ww459@cornell.edu.

|May 25, 2022

Summary

This summary is machine-generated.

Engineered artificial cilia create programmable liquid flows for microfluidic applications. This new metasurface technology enables precise control of microscale fluid dynamics using electronic actuation and wireless operation.

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Area of Science:

Microfluidics
Biomimetics
Materials Science

Background:

Biological cilia efficiently manipulate fluids at the microscale.
Engineered ciliary platforms face challenges in achieving controllable fluid manipulation.
Existing actuation methods (optical, magnetic, electrical) have limitations for practical applications.

Purpose of the Study:

To develop an active metasurface of electronically actuated artificial cilia.
To demonstrate the ability to create arbitrary and switchable surface flow patterns.
To enable wireless operation and improved pumping efficiency through metachronal waves.

Main Methods:

Fabrication of voltage-actuated artificial cilia generating non-reciprocal motion.
Design of cilia unit cells capable of creating elemental flow geometries.
Integration with a light-powered complementary metal-oxide-semiconductor (CMOS) clock circuit for wireless control.
Experimental demonstration and theoretical computation of flow patterns and pumping efficiency.

Main Results:

Achieved surface flows at tens of microns per second with low actuation voltages (1V).
Demonstrated local control over elemental flow geometries using individual cilia unit cells.
Successfully created an active metasurface capable of generating and switching between arbitrary flow patterns.
Validated wireless operation and improved pumping efficiency using metachronal waves via a CMOS circuit.

Conclusions:

Active metasurfaces of electronically actuated artificial cilia offer a novel approach for microfluidic manipulation.
The developed platform allows for precise, programmable control of fluid dynamics at the microscale.
This technology holds significant potential for applications in microfluidic pumping, microrobotics, and lab-on-a-chip devices.