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Highly Customizable 3D Microelectrode Arrays for In Vitro and In Vivo Neuronal Tissue Recordings.

J Abu Shihada1,2, M Jung1,2, S Decke1

  • 1Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, 52428, Jülich, Germany.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 19, 2024
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Summary
This summary is machine-generated.

Researchers developed advanced 3D-printed microelectrode arrays (MEAs) for superior neural signal recording. These novel devices offer enhanced spatial resolution and signal-to-noise ratio for detailed brain network analysis.

Keywords:
3D flexible implants3D microelectrode arrays3D printingneural interfacestwo‐photon polymerization

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Area of Science:

  • Neuroscience
  • Bioengineering
  • Materials Science

Background:

  • Planar microelectrode arrays (MEAs) have limitations in spatial resolution and signal-to-noise ratio (SNR) for detailed neural network studies.
  • Understanding neural function and synaptic plasticity requires improved recording capabilities.

Purpose of the Study:

  • To overcome limitations of planar MEAs by fabricating highly customizable 3D-printed MEAs.
  • To achieve higher spatial resolution and SNR for in vitro and in vivo neural recordings.

Main Methods:

  • Utilized a customizable 3D printing process combined with thin film technology.
  • Employed a self-aligned template-assisted electrochemical deposition process.
  • Fabricated 3D-printed MEAs on both stiff and flexible substrates with high-aspect ratio electrodes (up to 33:1).

Main Results:

  • Demonstrated design flexibility and physical robustness of the 3D MEAs.
  • Successfully recorded neural activity in 3D neuronal cultures, retinal explants, and the cortex of living mice.
  • Achieved high-quality neural recordings, showcasing the versatility of the 3D MEA technology.

Conclusions:

  • Customizable 3D MEAs offer unique opportunities for studying neural activity in various conditions, both in vitro and in vivo.
  • These devices can advance drug screening and neuromodulation systems by accurately monitoring large neural networks.
  • The developed MEAs provide a versatile platform for detailed neural network analysis and understanding synaptic plasticity.