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Vol. 151, No. 4, April 2013, pp. 36-40




A Molecular Imprinting TNT Sensitive Detection Sensor Based on Film Bulk Acoustic Resonator
1 Qimeng LV, 1 Guangmin WU, 1* Jianming CHEN, 1 He Qun Chu, 2 MAI John D.

1 MEMS Laboratory, Department of Physics, Kunming University
of Science and Technology, Kunming 650500, China;

2 Department of Mechanical and Biomedical Engineering,
City University of Hong Kong, Hong Kong, China

E-mail: lqmeng2008@qq.com, jmchen@inems.com


Received: 13 March 2013   Accepted: 18 April 2013   Published: 30 April 2013

Digital Sensors and Sensor Sysstems


Abstract: Highly sensitive and selective sensors for detection of explosive devices are important tools for maintaining public safety and security, especially the ability to quickly detect the presence of trace amounts of 2.4.6-Trinitrotoluene (TNT) in the air. Molecularly imprinted polymers (MIP) have the characteristics of both a high sensitivity and a high selectivity. Hence, we designed and simulated a film bulk acoustic resonator (FBAR) which uses a MIP substrates as an adsorption layer for detection of trace amounts of TNT. Starting with the Mason model, a numerical analysis of the FBAR resonator is performed. The results show that the quality of the mass loudness per unit area of the sensor is up to 0.5 pg/Hz/cm2, which is much higher than the quality of a conventional QCM sensor. Other calculated performance specifications of the sensor are also presented.


Keywords: 2.4.6-Trinitrotoluene, Explosives detection, Mason model, Film bulk acoustic resonator, Molecular imprinting technique


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