Hollow Au/Polypyrrole Capsules to Form Porous and Neural Network Like Nanofibrous Film for Wearable, Super Rapid, and Ultrasensitive NH3 Sensor at Room Temperature.
Wearable conducting polymer based NH3 sensors are highly desirable in real time environmental monitoring and human health protection but still a challenge for their relatively long response/recovery time and moderate sensitivity at room temperature. Herein, we present an effective route to fulfill this challenge by constructing porous and neural network like Au/polypyrrole (Au/PPy) electrospun nanofibrous film with hollow capsular units for NH3 sensor. Taking the unique architecture and synergistic effect between Au and PPy, our sensor exhibits not only super rapid response/recovery time (both ~7 s) faster than all reported sensors, but also stable and ultrahigh sensitivity (response reaches ~2.3 for 1 ppm NH3) at room temperature even during repeated deformation. Furthermore, good selectivity has been also achieved. These outstanding properties make our sensor hold great potential in real time NH3 related disease diagnosis and environmental monitoring at room temperature.
ACS applied materials interfaces