A patterned polystyrene-based microelectrode array for in vitro neuronal recordings

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Substrate-integrated microelectrode arrays (MEAs) are crucial for recording neural signals (action potentials) from cultured cells.
• Traditional MEA fabrication involves complex substrate preparation for optimal cell adhesion, differing from standard cell culture techniques.

Purpose of the Study:

• To develop a novel MEA with simplified substrate preparation for enhanced cell adhesion and reliable neural recordings.
• To demonstrate the electrochemical stability and cell culture compatibility of the new MEA design.

Main Methods:

• Fabrication of MEAs utilizing indium tin oxide microelectrodes.
• Development of a patterned polystyrene layer for electrode encapsulation.
• Assessment of electrochemical stability, cell viability, and in vitro electrophysiological recordings.

Main Results:

• Successful fabrication of MEAs with indium tin oxide electrodes and patterned polystyrene encapsulation.
• Demonstrated electrochemical stability of both electrodes and encapsulation material.
• Confirmed viable cell culture and successful in vitro recording of neural signals.

Conclusions:

• The novel MEA design with patterned polystyrene encapsulation offers a simplified and effective platform for cell culture and neural recordings.
• This approach addresses challenges in substrate preparation, making MEA technology more accessible for pharmacological and toxicological studies.