Electrical engineering

Fabrication

Pathology

Spinning

Nanotechnology

Electrical conductor

Elastomer

Wearable computer

Engineering

Electronics

Embedded system

Composite material

Materials science

Alternative medicine

Thermoplastic polyurethane

Gauge factor

Thermoplastic

Computer science

Wearable technology

Coaxial

Carbon nanotube

Strain gauge

Medicine

Mechanical engineering

Advanced Functional Materials

Highly conductive and stretchable fibers are crucial components of wearable electronics systems. Excellent electrical conductivity, stretchability, and wearability are required from such fibers. Existing technologies still display limited performances in these design requirements. Here, achieving highly stretchable and sensitive strain sensors by using a coaxial structure, prepared via coaxial wet spinning of thermoplastic elastomer‐wrapped carbon nanotube fibers, is proposed. The sensors attain high sensitivity (with a gauge factor of 425 at 100% strain), high stretchability, and high linearity. They are also reproducible and durable. Their use as safe sensing components on deformable cable, expandable surfaces, and wearable textiles is demonstrated.

Coaxial Thermoplastic Elastomer‐Wrapped Carbon Nanotube Fibers for Deformable and Wearable Strain Sensors