| 초록 |
The real-time detection of toxic and critical gas is importantly demanded in recent medical, food, military industries, etc. The wireless system is particularly useful commercial method for it due to simple installation, low cost and high nodal densities. In this research, we introduce wireless radio frequency identification (RFID) sensor system, composed of an RFID reader antenna and an ultrahigh frequency RFID tag to detect ammonia gas. In particular, carboxyl group functionalized polypyrrole (C-PPy) nanoparticles are covalently bonded to the ultrahigh frequency RFID tag to enhance stability between the PPy backbone and the RFID tag during exposure to target gas. The new sensor shows high sensitivity by detecting low concentrations (0.1 ppm) and working from a long distance up to 50 cm. And then, it maintains its performance during deformation such as bending and twisting. |
