Toward Skin-like Sensors: Stretchable Conductive Gels for Triboelectric Applications

Area of Science:

• Materials Science
• Nanotechnology
• Wearable Electronics

Background:

• Increasing demand for flexible, self-powered sensors in AI and wearable tech.
• Conventional electrodes lack mechanical compatibility with soft, skin-like systems.

Purpose of the Study:

• To provide a comprehensive review of stretchable conductive gel-based triboelectric devices.
• To compare different conductive gel types and their properties.
• To highlight the role of gels in skin-like sensing and triboelectric applications.

Main Methods:

• Systematic summary and comparison of conductive gel classes (hydrogels, organogels, ionogels).
• Analysis of gel properties: composition, crosslinking, conductivity, mechanical characteristics.
• Review of device configurations (thin-film, fiber, textile) and structure-function relationships.

Main Results:

• Conductive gels offer softness, stretchability, self-healing, and conformability for intimate skin contact.
• Key performance attributes discussed: stretchability, self-healing, thermal/optical tolerance, durability, stability.
• Structure-function relationships explored for various device architectures.

Conclusions:

• Stretchable conductive gels are crucial for advanced skin-like triboelectric sensors.
• Further research needed to address current challenges and optimize gel-based systems.
• Guidelines provided for designing high-performance, gel-based skin-like sensors.