Nanoengineered highly sensitive and stable soft strain sensor built from cracked carbon nanotube network/composite bilayers

Sensitivity and stretchability are two key physical parameters for advanced piezoresistive sensors, especially those that can be incorporated into clothing or attached directly on human body. Big challenge remains in achieving both single device. Here, to obtain high strain sensitivity wide measurement range simultaneously, a nano-engineered bilayer composed of cracked carbon nanotube (CNT) network elastomer infiltrated CNT composite has been developed. This design takes advantage the layer which is able provide sensor with resistance (gauge factor between 8 207), (>50%) good linearity (R2 > 93%) three ranges. The coupled nanocomposite utilized confine crack evolution resulting significantly improved stability reproducibility (>10,000 loading-unloading cycles). Application such construction also processes fast response time (<10 ms) cyclic drift less than 0.01% motion detection. Piezoresistive responses sensors designed effectively tuned meet specific requirements through choosing sponge properties control individual thickness.