NG.3 - Room Temperature High Performance NH3 Sensor:In Situ Growth Polyaniline Nanofibers Decorated by SnO2 on Flexible PET Substrate

17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
New Materials for Gas Sensing
F. Liu, S. Li, G. Lu - State Key Laboratory on Integrated Optoelectronics, Key Laboratory of gas sensors, Jilin Province and College of Electronic Science and Engineering, Jilin University, Changchun (China)
348 - 349


The polyaniline (PANI) nanofibers based chemical sensors assembled on flexible PET substrate are the current research hotspot, because of its low cost, flexible design and room temperature detection. In order to further enhance the gas sensing properties, the preparation of hybrid materials with semiconducting metal oxides (SMOs) decorate PANI to the formation of heterojunction structure is an effective strategy. Herein, we presented PANI decorated by SnO2 (PAS) hybrid by in-situ chemical oxidative polymerization method. The materials are assembled on the flexible polyethylene terephthalate (PET) substrate with no extra electrode to fabricate the high performance room temperature NH3 sensor. The gas sensing performance of the assembled sensors indicates that the sensor based on PAS10 exhibits the highest response value at about 15 to 100 ppm NH3 at room temperature, which is 5 times higher than that of pure PANI. Additionally, the developed sensor also displays wonderful selectivity against other gases and good humidity resistance. The excellent sensing performance for the device based on PAS10 and flexible PET substrate is expected to hold great promise for developing wearable flexible electronics.