Highly sensitive and skin-like pressure sensor based on asymmetric double-layered structures of reduced graphite oxide

摘要

In this work, a resistive pressure sensor based on asymmetric double-layered structures was fabricated readily by direct laser reduction of graphite oxide(GO) to graphene. The pressure sensor shows high sensitivity (~2kPa~(-1)), fast response time (~0.15ms) and high cycle stability. Its response frequency to the acoustic vibration can be up to ~2 kHz. More importantly, the sensor can be pasted on the skin to monitor the wrist pulse in real-time. In addition, it can detect the finger touching and wrist bending. The high performance of this skin-like sensor, along with its facilely scaled up fabrication process, facilitates its great potential used in the wide applications such as pressure sensing, health monitor and even human-computer interaction.