Highly sensitive wearable sensor based on a flexible multi-layer graphene film antenna

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Carbon nanomaterials are promising for flexible antenna sensors due to their electromechanical properties.
• Existing carbon nanomaterial composites face challenges with low conductivity and toughness.

Purpose of the Study:

• To investigate a flexible multi-layer graphene film (FGF) for high-performance wearable antenna sensors.
• To address limitations of conductivity and toughness in carbon-based sensor materials.

Main Methods:

• Fabrication of a flexible multi-layer graphene film (FGF).
• Characterization of the FGF's conductivity, strain sensitivity, and mechanical properties.
• Performance evaluation of the FGF as a 1.63 GHz antenna sensor.

Main Results:

• The FGF achieved a high conductivity of 10^6 S/m.
• The FGF antenna sensor exhibited high strain sensitivity (9.8 for compressive bending, 9.36 for tensile bending), outperforming copper sensors.
• Demonstrated excellent mechanical flexibility, reversible deformability, and structural stability.

Conclusions:

• The developed FGF is a highly conductive and mechanically robust material suitable for flexible antenna sensors.
• FGF antenna sensors show significant potential for applications in wearable devices and wireless strain sensing.
• This research advances the use of graphene-based materials in flexible electronics.