Bioinspired electrically stable, optically tunable thermal management electronic skin via interfacial self-assembly

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Human skin provides essential functions including sensation, thermal regulation, and protection.
• Electronic skin (E-skin) excels in sensory replication but struggles with adaptive thermal management.
• Mimicking biological systems is key to advancing E-skin capabilities.

Purpose of the Study:

• To develop a novel hybrid electronic-photonic skin (hEP-skin) with adaptive thermal management.
• To achieve stable electrical conductivity in E-skin under mechanical stress.
• To integrate advanced sensory and thermal functionalities into a single wearable device.

Main Methods:

• Fabrication of hEP-skin using an elastomer embedded with aligned silver nanowires via interfacial self-assembly.
• Utilizing mechanically adjustable optical properties for thermal control.
• Testing electrical conductivity and mechanical stability under various deformations (stretching, bending, torsion) over 10,000 cycles.

Main Results:

• The hEP-skin demonstrated adaptive thermal management, achieving +3.5°C warming for heat preservation and -4.2°C cooling for passive heat dissipation.
• Achieved ultra-stable electrical conductivity of approximately 4.5×10⁴ S/cm, maintaining performance under extensive mechanical deformations.
• Successfully integrated stretchable light-emitting E-skin with adaptive thermal management capabilities.

Conclusions:

• The developed hEP-skin successfully mimics squid skin's adaptive thermal regulation.
• This technology offers a promising platform for advanced wearable electronics with integrated thermal management.
• The hybrid approach overcomes limitations of traditional E-skin, paving the way for more sophisticated biomimetic devices.