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Carbon Nanotube Modified Microelectrode Array for Neural Interface
Mohaddeseh Vafaiee1, Raheleh Mohammadpour1, Manouchehr Vossoughi1,2
1Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
Frontiers in Bioengineering and Biotechnology
|February 1, 2021
Summary
Carbon nanotubes (CNTs) coatings enhance neural interfaces by significantly reducing electrode impedance. These CNT-modified gold multi-electrode arrays (MEAs) offer improved stability and durability for long-term nerve implant applications.
Area of Science:
- Biomedical Engineering
- Materials Science
- Neuroscience
Background:
- Carbon nanotubes (CNTs) coatings are recognized for their potential in neural interface applications.
- CNTs possess unique mechanical and electrical properties beneficial for nerve implants.
Purpose of the Study:
- To fabricate and evaluate carbon nanotubes multi-electrode arrays (CNT-modified-Au MEAs) for neural interfaces.
- To compare the electrochemical impedance of CNT-modified-Au MEAs with traditional gold multi-electrode arrays (Au-MEAs).
Main Methods:
- Fabrication of CNT-modified-Au MEAs based on Au-MEAs.
- Electrochemical impedance spectra analysis using equivalent circuit models.
Main Results:
- CNT-modified-Au MEAs exhibited a 50% reduction in electrode impedance at 1 kHz compared to Au-MEAs (8 Ω vs. 17 Ω).
- The CNT-modified electrodes demonstrated low impedance, high stability, durability, and scratch resistance.
Conclusions:
- CNT-modified-Au MEAs are suitable for long-term neural interface applications due to their superior electrochemical and mechanical properties.
- The developed CNT coatings offer a significant improvement over conventional electrode materials for neural implants.
