Synthesis of NiS2 nanomaterial as wide range pressure sensor

With the vigorous development of industry and information technology, people's requirements for sensors are becoming more and more diversified and universal. It is still a challenge to find a new type of pressure sensor with low cost, simple preparation, wider pressure test range, and higher sensitivity. Hereby, we report a novel flexible pressure sensor with a wide pressure detection range and robust mechanical properties, taking advantage of transition metal sulfide NiS2, adsorbed in melamine sponge as the active substance. The flexible sensor deforms under pressure with a internal microstructure change and a corresponding conductivity ramping. The addition of elastic polyvinylidene fluoride after curing improves the impact resistance and enables higher stability. Experiments show that the resistance pressure sensor responds within a wide range of 50 kPa with a high sensitivity of below 0.0345 kPa(-1) and a fast response time of 0.64 s. Its excellent performance makes the sensor promising for wearable electronics and health monitoring devices.