Stretchable bioelectrodes.

Area of Science:

• Biomedical Engineering
• Materials Science
• Cell Biology

Background:

• Studying cell behavior under mechanical strain is crucial for understanding tissue development and disease.
• Existing electrode arrays often lack the stretchability required for dynamic mechanical testing.
• Developing robust, biocompatible platforms for cell-strain experiments is an ongoing challenge.

Purpose of the Study:

• To develop and characterize a novel stretchable electrode array for investigating cellular responses to mechanical strain.
• To assess the biocompatibility and mechanical durability of the electrode array.
• To demonstrate the utility of the array for cell culture and electrical stimulation.

Main Methods:

• Fabrication of a polydimethylsiloxane (PDMS) platform with integrated gold electrodes.
• Utilizing fusible indium alloy in microchannels for stretchable interconnections.
• Testing mechanical properties up to 40% strain and performing 100 cycles at 35% strain.
• Culturing mouse cardiomyocytes on the platform and conducting electrical pacing.

Main Results:

• The electrode array demonstrated high stretchability, withstanding up to 40% strain.
• The device showed excellent durability, with no failures after 100 strain cycles at 35%.
• Successful culturing of mouse cardiomyocytes and electrical pacing were achieved on the platform.

Conclusions:

• The developed stretchable electrode array is a promising tool for studying cell behavior under mechanical strain.
• Its biocompatibility and mechanical robustness make it suitable for long-term cell culture and dynamic experiments.
• This technology facilitates advanced research in mechanobiology and regenerative medicine.