A dual-module co-regulated stable pressure sensor for human activity monitoring.

Abstract

Flexible pressure sensors have received significant attention for applications in wearable devices and human health monitoring in healthcare. Nevertheless, the preparation of pressure sensors with a wide operating range and high sensitivity remains a huge challenge. Herein, a piezoresistive sensor with a porous microstructure is prepared by using a sandpaper and salt dual-template method. Carbon black and carbon nanotubes are used as conductive fillers and the pressure sensor shows a high sensitivity (58.33 kPa-1) and extremely fast response and recovery times (3 and 10 ms, respectively). Furthermore, this CNT/PDMS/CB sensor shows a high detection limit of 400 kPa and excellent cycling stability of over 20 000 cycles. This high-performance pressure sensor is promising for many applications such as wearable electronics and health monitoring.