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3D printed microfluidic devices with integrated versatile and reusable electrodes.

Jayda L Erkal1, Asmira Selimovic, Bethany C Gross

  • 1Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI 48824, USA. dspence@chemistry.msu.edu.

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|April 26, 2014
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Summary
This summary is machine-generated.

This study introduces two 3D printed devices for electrochemical detection, enabling modular electrode integration for analyzing dopamine, nitric oxide, and adenosine triphosphate. The 3D printed platforms demonstrate reproducible and transferable results for biosensing applications.

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Area of Science:

  • Electrochemistry
  • 3D Printing
  • Biosensing

Background:

  • Electrochemical detection is crucial for analyzing biological analytes.
  • Modular and reusable electrode systems enhance experimental flexibility.
  • 3D printing offers a versatile platform for fabricating custom analytical devices.

Purpose of the Study:

  • To develop and validate two novel 3D printed devices for electrochemical detection of biological analytes.
  • To demonstrate the utility of modular, interchangeable electrodes in a 3D printed microfluidic and fluidic platform.
  • To assess the performance of these devices for detecting dopamine, nitric oxide, and adenosine triphosphate.

Main Methods:

  • Fabrication of two distinct 3D printed devices: a microfluidic platform and a fluidic collection device.
  • Integration of various electrode materials (platinum, platinum black, carbon, gold, silver) into threaded receiving ports.
  • Electrochemical analysis of dopamine using a glassy carbon electrode and nitric oxide using a platinum/platinum black electrode.
  • Measurement of adenosine triphosphate (ATP) release under varying oxygen concentrations.

Main Results:

  • The microfluidic device achieved a limit of detection (LOD) of 500 nM for dopamine and 1 μM for nitric oxide (NO).
  • Nafion coating on the glassy carbon electrode effectively excluded nitrite interference during dopamine detection.
  • The fluidic device quantified a 2.4-fold increase in ATP release from hypoxic samples compared to normoxic samples.
  • Demonstrated reproducible and transferable results across multiple lab environments.

Conclusions:

  • 3D printing is a viable and reproducible technique for fabricating electrochemical sensing devices.
  • The modular design allows for easy electrode replacement, repolishing, and reuse, enhancing cost-effectiveness.
  • These devices show promise for sensitive and selective detection of key biological analytes in various settings.