Rapid response, superior stable, and durable pressure sensor with rGO/CNC interdigital electrode

Abstract

The development of pressure sensors with swift responsiveness and exceedingly high stability is an inevitable requirement for wearable electronic devices. Herein, we fabricated a high performance pressure sensor through the encapsulation of an interdigital electrode with employing polydimethylsiloxane (PDMS). The pressure sensor comprised self-assembled multifunctional reduced graphene oxide/cellulose nanocrystalline (rGO/CNC) composite film with interdigital electrode (RCI), and involves the use of PDMS to enhance the robustness and pressure sensitivity of the pressure sensor. The sensing enhancement is reflected in minimal conductive attenuation, under 30 min ultrasonic with a ΔR/R0 < 0.1 % in the initial phase and an impressive response time of 51 ms. Due to the outstanding performance, a smart glove that is integrated with the RCI sensor not only performs well timely feedback on human motions, but also achieves intelligent recognitions of various gestures assisted by neural network algorithms (the accuracy up to 99.1 %). Furthermore, this study offers an innovative decoupling method that effectively separates contact interface resistance and body resistance. The developed piezoresistive sensor and decoupling method are meaningful and valuable to long-term intelligent health management and human–machine interactions applications.