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

• Published in: Sensors and actuators. B, Chemical Chemical, 2018-02, Vol.255, p.1262-1267
• Main Authors: Zhu, Yunsong, Li, Junwen, Cai, Hongbing, Wu, Yiming, Ding, Huaiyi, Pan, Nan, Wang, Xiaoping
• Format: Article
• Language: English
• Subjects: Asymmetric double-layered structure; Asymmetry; Biosensors; Frequency stability; Graphite; Pressure sensing; Pressure sensors; Reduced graphite oxide; Response time; Sensors; Wrist
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2017.08.116

[Display omitted] •A skin-like resistive pressure sensor based on laser reduction of graphite oxide was established.•The sensor shows high sensitivity (∼2kPa−1), fast response/release time (0.1ms / 0.3ms), outstanding stability.•The response frequency up to ∼2kHz.•The sensor can monitor the wrist pulse in real-time. 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 ∼2kHz. 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.