Modulation of action potentials using PEDOT:PSS conducting polymer microwires.

Area of Science:

• Biotechnology
• Materials Science
• Neuroscience

Background:

• Electrical stimulation is crucial for controlling cell function.
• Existing methods for electrical modulation can be invasive or lack spatial precision.

Purpose of the Study:

• To develop and evaluate the use of PEDOT:PSS conducting polymer microwires for precise control of cellular action potentials.

Main Methods:

• Electrochemical synthesis of PEDOT:PSS microwires with controlled diameters (860 nm to 4.5 μm) and conductivity (~30 S/cm).
• Controlled polymerization length by adjusting electrode spacing.
• Application of microwires to modulate action potentials in cardiomyocytes.
• Assessment of cell membrane integrity using assays.

Main Results:

• Microwires successfully modulated cardiomyocyte action potentials, synchronizing cellular contractions with applied voltage frequency.
• Membrane integrity assays confirmed no cellular damage from the delivered voltage.
• Demonstrated high spatial precision in electrical control.

Conclusions:

• PEDOT:PSS conducting polymer microwires are effective for precise, non-damaging electrical modulation of cells.
• These microwires represent a promising technology for minimally invasive bioelectronic devices.
• Potential applications in controlling cellular electrical properties with high spatial accuracy.