Author/Authors :
Fake Li، نويسنده , , Hang Li، نويسنده , , Hongmin Jiang، نويسنده , , Kejun Zhang، نويسنده , , Kai Chang، نويسنده , , Shuangrong Jia، نويسنده , , Wenbin Jiang، نويسنده , , Ya Shang، نويسنده , , Weiping Lu، نويسنده , , Shaoli Deng، نويسنده , , Ming Chen، نويسنده ,
Abstract :
Nano-scaled polypyrrole (PPy) particles have been successfully synthesized with the help of Triton X-100 micelles via soft template approach. The polypyrrole nanoparticles have been spin-coated on surface acoustic wave (SAW) transducers to demonstrate their sensing capability toward acetone gas exposure. Field Emission Scanning Electron Microscopes (FE-SEM) and Fourier transform infrared (FT-IR) spectroscopy have been utilized to characterize these PPy nanoparticles. The PPy nanoparticles have an average diameter of 95 nm. The responses of the sensors are linearly associated with the acetone concentrations in the range from 5.5 ppm to 80 ppm. In response to 5.5 ppm acetone exposure, the response and recovery time are 9 s and 8.3 s, respectively. SAW sensors coated with PPy nanoparticles were potentially useful to detect acetone.
Keywords :
Polypyrrole nanoparticles , Triton X-100 , Gas sensor , Surface acoustic wave transducer , Acetone.