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A Remote Sensor for Detecting Methane Based on Palladium-Decorated Single Walled Carbon Nanotubes
School of Communication and Information Engineering, Xi'an University of Science and Technology, No.58, Yan Ta Road, Xi'an 710054, China
* Author to whom correspondence should be addressed.
Received: 27 May 2013; in revised form: 24 June 2013 / Accepted: 27 June 2013 / Published: 10 July 2013
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.
Keywords: gas sensor; methane concentration; Pd-SWCNTs; RFID; room temperature
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Cite This Article
MDPI and ACS Style
Liu, J.; Li, G. A Remote Sensor for Detecting Methane Based on Palladium-Decorated Single Walled Carbon Nanotubes. Sensors 2013, 13, 8814-8826.
Liu J, Li G. A Remote Sensor for Detecting Methane Based on Palladium-Decorated Single Walled Carbon Nanotubes. Sensors. 2013; 13(7):8814-8826.
Liu, Jian; Li, Guomin. 2013. "A Remote Sensor for Detecting Methane Based on Palladium-Decorated Single Walled Carbon Nanotubes." Sensors 13, no. 7: 8814-8826.