Laser-induced graphene (LIG)-based pressure sensor and triboelectric nanogenerator towards high-performance self-powered measurement-control combined system

Abstract

Pressure sensors have gained widespread attention in recent years, playing an important role in wearable devices, smart skin and human-computer interaction. Nevertheless, the high performance of pressure sensors usually requires a complex and high-cost preparation process. Worse yet, it has been established that pressure sensors mainly powered by external batteries, which cannot meet the needs of ultra-long standby and portability. Herein, we present a reduced graphene oxide (rGO)-cloth based pressure sensor with laser-induced graphene (LIG) prepared by a simple and low-cost preparation process. LIG not only contribute to the sensitivity of pressure sensors (from 20.6 kPa−1 to 30.3 kPa−1), but also improve the transfer charge density of triboelectric nanogenerator (TENG) (from 160 µC/m2 to 270 µC/m2). Given these advantages, a high-performance self-powered measurement-control combined system consisting of the LIG-based pressure sensors and TENG is constructed, which bears huge potential to support the development of wearable devices, smart skin and human-computer interaction.