用于接近-压力感知的全纸基智能传感器

In recent years, with growing demands for wearable electronics, the paper-based sensors have been developed rapidly due to its low-cost, environment-friendly and easy-making features. However, there are two obvious challenges that are awaiting to be solved: (1) The use of metal electrodes in most paper-based sensors largely weakens the inherent advantages of paper; (2) The sensing mechanism is limited to a single tactile function, which makes it difficult to perceive multiple stimuli. Here, we reported a capacitive-resistive all-paper-based sensor based on polypyrrole (PPy). The device can perceive approaching and pressure stimulation, so it can be applied to detect human motion and sense approaching objects. Moreover, we use the sensor to realize contact and non-contact Morse code input, and achieve an accurate distinction between the two modes. Our all-paper-based capacitive-resistive sensor has a simple structure for easy fabrication and has great capacity in the fields of wearable devices and green electronics.