Direct embedding and versatile placement of electrodes in 3D printed microfluidic-devices

Area of Science:

• Additive Manufacturing
• Microfluidics
• Electrochemistry

Background:

• Traditional microfluidic devices often require complex assembly for electrode integration.
• Achieving precise electrode placement within microchannels can be challenging.

Purpose of the Study:

• To demonstrate the integration of electrode materials into microfluidic devices using PolyJet 3D printing.
• To explore novel electrode configurations and their impact on electrochemical sensing performance.

Main Methods:

• Utilized stacked printing with liquid support for simultaneous fabrication of microfluidic channels and electrode integration.
• Investigated single electrode, electrode array, and generator-collector configurations.
• Performed in situ platinum black deposition for enhanced detection.

Main Results:

• Successfully integrated electrodes at arbitrary positions within microfluidic channels.
• Demonstrated that middle electrode placement significantly increases detection sensitivity compared to bottom placement.
• Showcased dual electrode detection of catechol using a generator-collector configuration.

Conclusions:

• PolyJet 3D printing offers a versatile platform for fabricating microfluidic devices with integrated electrodes.
• This approach simplifies device fabrication, enhances electrochemical detection capabilities, and allows for novel electrode designs.
• The developed method improves the ease of use and transferability of 3D-printed electrochemical devices.