Bioresorbable Conductive Wire with Minimal Metal Content.

Area of Science:

• Materials Science
• Biomedical Engineering
• Electrical Engineering

Background:

• Transient electronics require bioresorbable conductive materials for signal and energy transfer.
• Existing solutions may involve toxicity concerns due to higher metal content.

Purpose of the Study:

• To design and demonstrate a fully bioresorbable conductive wire with minimal metal content.
• To evaluate the electrical properties and functional lifetime of the proposed wire design.
• To explore the application of these wires in fabricating flexible electronic components.

Main Methods:

• Fabrication of bioresorbable wires using electron-beam evaporated magnesium on polymer fibers.
• Electrical insulation and water barrier provided by an extrusion-coated polymer sheath.
• Characterization of electrical resistance and functional lifetime in buffer solution.
• Fabrication and wireless measurement of planar radio frequency (RF) coils.

Main Results:

• The bioresorbable wires exhibited a resistance of approximately 1 Ω cm^-1.
• Functional lifetime in buffer solution exceeded one week.
• Flexible RF coils were successfully fabricated and wirelessly measured, demonstrating potential for wireless sensing.
• Properties are tunable by altering conductor materials and film thickness.

Conclusions:

• The developed wire design offers a viable approach for bioresorbable conductors with minimal metal usage.
• This technology has potential applications in transient electronics, particularly for wireless sensors where reduced toxicity is crucial.