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Related Experiment Video

Updated: Dec 25, 2025

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
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Magnesium-based biodegradable microelectrodes for neural recording.

Chaoxing Zhang1, Teresa H Wen2, Khaleel A Razak3

  • 1Materials Science and Engineering Program, University of California Riverside, 900 University Avenue, Riverside, CA 92521, United States; Department of Bioengineering, University of California Riverside, 900 University Avenue, Riverside, CA 92521, United States.

Materials Science & Engineering. C, Materials for Biological Applications
|March 25, 2020
PubMed
Summary
This summary is machine-generated.

Biodegradable magnesium microwires coated with polymers show promise as neural recording microelectrodes. These novel Mg-based electrodes offer superior performance and slower degradation, potentially reducing risks associated with traditional implants.

Keywords:
Biodegradable microelectrodes for neural applicationsElectrochemical deposition and spray coatingMagnesium (Mg) microwiresPoly(3,4‑ethylenedioxythiophene) (PEDOT) conductive polymerPoly(glycerol sebacate) (PGS) coating

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Area of Science:

  • Biomaterials Science
  • Neuroscience Engineering
  • Medical Device Development

Background:

  • Current neural recording microelectrodes face limitations like material degradation and the need for removal surgeries.
  • Magnesium (Mg) offers biodegradability, but requires functional coatings to enhance its properties for biomedical applications.

Purpose of the Study:

  • To fabricate and characterize biodegradable Mg microwire microelectrodes coated with poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(glycerol sebacate) (PGS).
  • To evaluate the in vivo neural recording performance and degradation properties of these novel Mg-based microelectrodes.

Main Methods:

  • Fabrication of Mg microwires with dual-layer PGS/PEDOT coating using electrochemical deposition and spray coating.
  • Characterization of coating homogeneity, surface morphology, and composition.
  • In vitro degradation studies in artificial cerebrospinal fluid (aCSF).
  • In vivo neural recording in the auditory cortex of mice.

Main Results:

  • PGS/PEDOT-coated Mg microwires exhibited high coating homogeneity and excellent charge storage capacity (1.72 mC/cm²), nearly 5 times higher than platinum.
  • Demonstrated stable and high-quality in vivo neural recordings with excellent signal-to-noise ratio.
  • Showed slower degradation and improved impedance stability compared to PEDOT-coated Mg electrodes in vitro.

Conclusions:

  • PGS/PEDOT-coated Mg microwires are feasible biodegradable microelectrodes for neural recording.
  • The dual-layer coating enhances electrode performance, stability, and degradation profile.
  • These Mg-based microelectrodes show potential for clinical translation, possibly eliminating secondary removal surgeries.