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Facile and Scalable Nanoneedle Array Fabrication for Enhanced Neural Signal Sensing on Microelectrode Arrays
Guoxu Yu1,2, Yuan Ma1,2, Yujiao Wang1,2
1State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, P.R. China.
ACS Applied Materials & Interfaces
|May 29, 2026
Summary
Researchers developed durable nanoneedle-structured microelectrode arrays (MEAs) to improve signal-to-noise ratio (SNR) for long-term neuronal network studies. This novel fabrication enhances electrode performance and enables clear capture of neural activity over extended periods.
Area of Science:
- Neuroscience
- Materials Science
- Bioengineering
Background:
- Microelectrode arrays (MEAs) are crucial for in vitro neuronal network research.
- Miniaturization for higher resolution reduces signal-to-noise ratio (SNR).
- Current surface modifications lack durability due to poor adhesion.
Purpose of the Study:
- To develop a novel, durable surface modification for MEAs.
- To enhance the SNR for electrophysiological signal detection.
- To enable long-term monitoring of neuronal network activity.
Main Methods:
- A facile and scalable nanofabrication strategy was employed.
- Substrate was directly transformed into a nanoneedle array architecture in situ.
- Experimental characterizations validated electrode performance.
Main Results:
- The nanoneedle structure significantly improved electrode durability.
- Enhanced SNR was achieved for electrophysiological signal detection.
- Synchronized neuronal burst activities were successfully captured after 3 weeks of in vitro culture.
Conclusions:
- The nanoneedle-structured MEAs offer superior durability and performance.
- This technology is suitable for long-term electrophysiological studies of neuronal networks.
- The fabrication method is scalable and effective for enhancing MEA functionality.
