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 95nm. The responses of the sensors are linearly associated with the acetone concentrations in the range from 5.5ppm to 80ppm. In response to 5.5ppm acetone exposure, the response and recovery time are 9s and 8.3s, respectively. SAW sensors coated with PPy nanoparticles were potentially useful to detect acetone.
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