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