Thermoelectric porous laser-induced graphene-based strain-temperature decoupling and self-powered sensing

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Wearable self-powered sensors are advancing, but decoupling multiple simultaneous signals remains a challenge.
• Accurate, simultaneous monitoring of physical parameters like strain and temperature is crucial for various applications.

Purpose of the Study:

• To design and demonstrate a stretchable, self-powered sensor capable of decoupled strain and temperature sensing.
• To enhance thermoelectric properties through synergistic effects in nanocomposites.

Main Methods:

• Fabrication of stretchable thermoelectric porous graphene foam using laser scribing.
• Characterization of sensor performance for strain and temperature detection.
• Investigation of synergistic effects between porous graphene and thermoelectric components.

Main Results:

• The sensor achieved decoupled detection of strain (gauge factor of 1401.5) and temperature (resolution of 0.5°C).
• The Seebeck coefficient was significantly enhanced by nearly four times (from 9.703 to 37.33 μV/°C).
• The sensor demonstrated 45% stretchability, enabling applications in early fire detection and in-situ wound monitoring.

Conclusions:

• The developed porous graphene foam-based sensor offers a viable solution for decoupled multimodal sensing.
• This technology has potential for advanced health monitoring and remote sensing applications.
• The design principles can be extended to create novel sensors for multi-parameter detection.