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Punch card programmable microfluidics.

George Korir1, Manu Prakash1

  • 1Department of Bioengineering, Stanford University, 443 Via Ortega, Stanford, California, 94305, United States of America.

Plos One
|March 5, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a hand-crank powered, punch card-based microfluidic platform for programmable fluid control. This innovation enables low-cost, field-deployable biochemical assays and diagnostics without external components.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Mechanical Engineering

Background:

  • Microfluidics offers efficient bio-chemical assays and diagnostics but faces barriers in low-cost field deployment.
  • Integrated, programmable control of nanoliter fluids and droplets in microfluidic systems remains a challenge.

Purpose of the Study:

  • To develop a self-contained, programmable microfluidic platform using punch card technology.
  • To enable arbitrary fluid control, including pumps, mixers, and droplet generation, without external components.

Main Methods:

  • A mechanical reader/actuator interprets information from a punched paper tape.
  • The system executes operations on a plug-and-play microfluidic chip.
  • Independent control of 15 on-chip pumps, valves, and a droplet generator was achieved.

Main Results:

  • Demonstrated robust operation by encoding "PUNCHCARD MICROFLUIDICS" with the droplet generator.
  • Achieved multiplexing by performing colorimetric water quality assays (pH, ammonia, nitrite, nitrate).
  • Successfully controlled 15 pumps, enhanced mixing, and utilized normally-closed valves.

Conclusions:

  • The punch card programmable microfluidic platform is portable, robust, low-cost, and easy to use.
  • This technology can facilitate field-based microfluidic applications in low-resource settings.
  • It has the potential to introduce microfluidics to educational contexts for children.