title: A remote sensor for detecting methane based on palladium-decorated single walled carbon nanotubes.
abstract: The remote detection of the concentration of methane at room temperature is performed by a sensor that is configured by the combination of radio frequency identification (RFID), and functionalized carbon nanotubes (CNTs). The proposed sensor is schemed as a thin film RFID tag in a polyethylene substrate, on which a metal trace dipole, a metal trace T impedance matching networks, a 0.5 µm-CMOS RF/DC rectifier chipset and a sensor head of palladium-decorated single walled carbon nanotubes (Pd-SWCNTs) are surface mounted in cascade. The performances of the sensor are examined and described by the defined parameters of the received signal strength index (RSSI) and the comparative analog identifier (∆AID). Results validate the sensor's ability to detect molecules of methane at room temperature, showing that the RSSI can increase 4 dB and the ∆AID can increase 3% in response to methane concentrations ranging from zero to 100 ppm.
authors.affiliation: School of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China. liujian02@xust.edu.cn
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Guomin
authors.initials: G
authors.lastname: Li
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D008697:Methane / Q000032:analysis*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010165:Palladium / Q000737:chemistry*; D057233:Radio Frequency Identification Device; D058998:Remote Sensing Technology / Q000295:instrumentation*; D014159:Transducers; D059015:Wireless Technology / Q000295:instrumentation*
chemical_list: D037742:Nanotubes, Carbon; D010165:Palladium; D008697:Methane