Highly sensitive pressure sensors based on conducting polymer-coated paper

Pressure sensor, as one of the most common components in the sensing systems, has attracted plenty of attention in recent years with urgent needs. Herein, a highly sensitive flexible pressure sensor based on conducing polymer (CP)-coated paper is developed via an ultra-simple approach of synthesis and fabrication. This paper based sensor displays an ultra-low detection limit as low as 0.3 Pa level, and outstanding sensitivity (similar to 2 kPa(-1), P <= 75 Pa), which can rank the top among that of the reported pressure sensors. The advantages based on paper framework such as low cost, portability, and easy disposability further enhance its feasibility. Meanwhile, combining its rapid and precise response at room temperature and the recognized stability of PPy in the ambient environment, the sensor would ensure direct and continuous environment monitoring with low energy consumption.