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A three-dimensional micro-electrode array for in-vitro neuronal interfacing.

Andrea Spanu1,2, Nicolò Colistra3, Pasqualina Farisello3

  • 1Department of Electrical and Electronic Engineering (DIEE), University of Cagliari, Via Marengo 3, 09123, Cagliari, Italy.

Journal of Neural Engineering
|June 2, 2020
PubMed
Summary
This summary is machine-generated.

We developed an easy-to-fabricate three-dimensional Micro-Electrode Array (3D-MEA) for brain-on-a-dish applications. This novel 3D-MEA significantly improves signal amplitude compared to traditional planar electrodes.

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Area of Science:

  • Neuroscience
  • Bioengineering
  • Materials Science

Background:

  • Standard planar microelectrode arrays (MEAs) have limitations in capturing complex neural activity.
  • Brain-on-a-dish models require advanced tools for detailed electrophysiological recordings.

Purpose of the Study:

  • To develop a novel, easy-to-fabricate three-dimensional Micro-Electrode Array (3D-MEA).
  • To enhance signal amplitude and improve coupling for in vitro electrophysiology.
  • To provide a versatile platform for brain-on-a-dish applications.

Main Methods:

  • Fabrication of pillar-shaped gold microelectrodes via electroplating on standard MEAs.
  • Achieving electrode heights over 100 µm on various substrates (glass, flexible plastic).
  • Validation using acute brain slices and recording neural activity.

Main Results:

  • Successful recording of epileptiform-like discharges and electrically-evoked neuronal activity.
  • Demonstrated substantial improvement in signal amplitude compared to planar electrodes.
  • Showcased high versatility for batch fabrication on rigid and flexible substrates.

Conclusions:

  • The developed 3D-MEA offers superior signal recording capabilities for in vitro electrophysiology.
  • The fabrication technique is versatile, enabling multi-level 3D structures.
  • This technology provides a flexible approach for advanced electrophysiological tools in neuroscience research.