| 초록 |
We fabricated radio frequency identification (RFID)-based wireless NO2 gas sensor using conducting nanocomposite paste which composed of multidimensional Fe2O3 hollow nanoparticles (mFeOxHNPs) and PANI:PSS. The wireless sensor system was composed of a network analyzer connected to an RFID reader antenna and an ultrahigh-frequency (UHF)-RFID tag immobilized with a sensing material. The mFeOxHNPs were produced by dual nozzle electrospray technique and calcination step. Through simple sonochemical and mechanical method, mFeOxHNPs and synthesized PANI:PSS solution were well mixed. The mFeOxHNPs/PANI:PSS (mFeOx/PANI:PSS) paste is a wireless sensor transducer that has demonstrated excellent material properties such as high electrical connectivity, good adhesion to the substrate, and high target sensitivity (~0.5 ppm) at room temperature. Moreover, its sensing performance also maintained even when bending and twisting, so we expected a good promising for wearable and portable applications. |
