Carbon-based neural electrodes: promises and challenges

Area of Science:

• Neuroscience
• Materials Science
• Bioelectronic Medicine

Background:

• Neural electrodes are crucial for recording and stimulating neural activity in neuroelectronic devices.
• Ideal electrode materials require biosafety, electrical conductivity, electrochemical stability, mechanical flexibility, and crack resistance.
• Traditional noble metals are used, but carbon materials offer superior electrochemical stability and corrosion resistance.

Purpose of the Study:

• To review neuroelectronic devices and electrode material requirements.
• To discuss the properties of various carbon allotropes for neural applications.
• To compare existing carbon-based neural electrode devices and explore future prospects.

Main Methods:

• Literature review of neuroelectronic devices and electrode material properties.
• Analysis of carbon allotropes, including bulk and nano forms.
• Critical comparison of fabricated carbon-based neural electrode devices.

Main Results:

• Carbon materials exhibit excellent electrochemical stability and corrosion resistance, surpassing traditional metals.
• Carbon's versatility through various allotropes allows for advanced 3D electrode fabrication.
• Several carbon types show promise for bioelectronic medicine, with many more potential candidates.

Conclusions:

• Carbon-based materials are highly promising for next-generation neural electrodes due to their unique properties.
• Further research and interdisciplinary collaboration are needed to fully harness carbon's potential in neural sciences.
• Carbon-based neuroelectronic devices offer significant advancements in neural recording and stimulation.