Fibrous Pressure Sensor with Unique Resistance Increase under Partial Compression: Coaxial Wet-Spun TiO/Graphene/Thermoplastic Polyurethane Multi-Wall Multifunctional Fiber.

Fiber-shaped resistive pressure-sensitive sensors are rare. Although fibers are widely used in strain sensors owing to their structural advantages, developing fiber-shaped resistive pressure sensors is challenging. This challenge arises because the fiber acts as a series circuit along its axis, requiring increased resistance in the compressed region for a significant signal.