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Sensors 2013, 13(7), 8814-8826; doi:10.3390/s130708814

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 / Revised: 24 June 2013 / Accepted: 27 June 2013 / Published: 10 July 2013
(This article belongs to the Special Issue Gas Sensors - 2013)
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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. View Full-Text
Keywords: gas sensor; methane concentration; Pd-SWCNTs; RFID; room temperature gas sensor; methane concentration; Pd-SWCNTs; RFID; room temperature

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Liu, J.; Li, G. A Remote Sensor for Detecting Methane Based on Palladium-Decorated Single Walled Carbon Nanotubes. Sensors 2013, 13, 8814-8826.

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