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Rapid flow in multilayer microfluidic paper-based analytical devices.

Robert B Channon1, Michael P Nguyen, Alexis G Scorzelli

  • 1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA. chuck.henry@colostate.edu.

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Summary
This summary is machine-generated.

Multilayer microfluidic paper-based analytical devices (microPADs) significantly increase flow rates, enabling complex field analyses. This advancement overcomes limitations of single-layer designs for point-of-care diagnostics.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Materials Science

Background:

  • Microfluidic paper-based analytical devices (microPADs) offer low-cost point-of-care (POC) solutions.
  • Limited flow rates and analytical complexity hinder widespread microPAD adoption.

Purpose of the Study:

  • Investigate multilayer microPADs to enhance flow rates in self-pumping paper devices.
  • Improve fluid dynamics for complex in-field analytical measurements.

Main Methods:

  • Fabrication of multilayer microPADs with controlled channel heights.
  • Optical and electrochemical measurements to analyze fluid dynamics.
  • Comparison with established microPAD flow theories.

Main Results:

  • Achieved a ~145-fold increase in flow rate using a 2-layer paper device compared to 1-layer designs.
  • Demonstrated enhanced performance in a 3D paper network (3DPN) format.
  • Obtained a 5x signal enhancement for ferrocene complex and cadmium detection in 3DPN devices.

Conclusions:

  • Multilayer designs effectively increase flow rates in microPADs.
  • 3DPN devices facilitate complex, self-pumping analytical measurements.
  • This technology enhances POC capabilities for field applications.