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Ampli: A Construction Set for Paperfluidic Systems.

Elizabeth A Phillips1,2, Anna K Young1,2, Nikolas Albarran2

  • 1Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Advanced Healthcare Materials
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Summary

Researchers developed modular paperfluidic blocks for easy diagnostics. This "biochemical breadboard" allows real-time control of reactions, enhancing usability and enabling user-driven design for point-of-care applications.

Keywords:
diagnosticsimmunoassayspaperfluidicspoint-of-carereconfigurable

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Analytical Chemistry

Background:

  • Traditional paper-based analytical devices (PADs) often lack modularity and real-time control.
  • Prototyping and fabrication of complex paperfluidic systems can be challenging and time-consuming.
  • Standardization of field-ready paper analytical systems is hindered by inherent complexities in their design.

Purpose of the Study:

  • To report the design and fabrication of reconfigurable, modular paperfluidics using a prefabricated reusable block library.
  • To introduce the asynchronous modular paperfluidic linear instrument-free (Ampli) block system, inspired by electronic breadboards.
  • To demonstrate a "Design for Hack" approach for diagnostics, enabling user-driven prototyping.

Main Methods:

  • Development of a library of prefabricated, reusable Ampli blocks for paperfluidic construction.
  • Functionalization of the "biochemical breadboard" with chemical, biological, and electrical elements.
  • Demonstration of real-time control over reaction flows, reagents, and rates using modular blocks.

Main Results:

  • Ampli blocks enable the formation of standard paperfluidic devices without external instrumentation.
  • Modular design allows for enhanced fluidic control, including starting, stopping, modifying, and reversing reaction flows.
  • Demonstrated improvements in colorimetric signals, reaction time tuning, and validation of multiplexed diagnostics.

Conclusions:

  • The Ampli block system standardizes the distributed fabrication of paper analytical systems for field use.
  • Modular paperfluidics significantly lowers prototyping barriers and enhances usability for point-of-care applications.
  • The system promotes user-driven innovation and redesign, extending the application of paper analytical systems beyond laboratory settings.