Detection of explosives with a coated piezoelectric quartz crystal

Tomita, Yutaka; Ho, Ming-Tzu; Guilbault, George G.

doi:10.1021/ac50045a027

Cited by 67 publications

(15 citation statements)

References 32 publications

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“…For detecting explosives vapours, many techniques such as electrochemical 5 , chromatographic techniques 6 , optical fibre 7 , fluorescence detection 8,9 , x-ray diffraction 10 , and surface acoustic wave (SAW) sensor 11,12 , have been reported.…”

Section: Review Papermentioning

confidence: 99%

Landmine Detection Technologies to Trace Explosive Vapour Detection Techniques

Kapoor

Kannan

2007

DSJ

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Large quantity of explosive is manufactured worldwide for use in various types of ammunition, arms, and mines, and used in armed conflicts. During manufacturing and usage of the explosive equipment, some of the explosive residues are released into the environment in the form of contaminated effluents, unburnt explosives fumes and vapours. Limited but uncontrolled continuous release of trace vapours also takes place when explosive-laden landmines are deployed in the field. One of the major technological challenges in post-war scenario worldwide is the detection of landmines using these trace vapour signatures and neutralising them safely. Different types of explosives are utilised as the main charge in antipersonnel and antitank landmines. In this paper, an effort has been made to review the techniques so far available based on explosive vapour detection especially to detect the landmines. A comprehensive compilation of relevant information on the techniques is presented, and their maturity levels, shortcomings, and difficulties faced are highlighted.

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Section: Review Papermentioning

confidence: 99%

Landmine Detection Technologies to Trace Explosive Vapour Detection Techniques

Kapoor

Kannan

2007

DSJ

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“…Various sensing techniques such as surface acoustic wave (SAW) sensors [4][5][6], luminescence based sensors [7][8][9], refractive index (RI) based optical sensors [10][11][12], cantilever sensors [13,14], quartz crystal microbalance (QCM) sensors [15,16], electrochemical sensors [17][18][19][20] and optofluidic ring resonator sensors [21] and have been used for the detection of DNT vapors. However, these methods have some disadvantages such as low sensitivity, low detection specificity and need for elevated working temperatures.…”

Section: Introductionmentioning

confidence: 99%

Gravure printed flexible surface enhanced Raman spectroscopy (SERS) substrate for detection of 2,4-dinitrotoluene (DNT) vapor

Sepehr

Eshkeiti

Narakathu

et al. 2015

Sensors and Actuators B: Chemical

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Please cite this article in press as: S. Emamian, et al., Gravure printed flexible surface enhanced Raman spectroscopy (SERS) substrate for detection of 2,4-dinitrotoluene (DNT) vapor, Sens. Actuators B: Chem. (2014), http://dx. a b s t r a c tAn efficient surface enhanced Raman spectroscopy (SERS) substrate was successfully fabricated by gravure printing a thin film of silver nanoparticle (Ag NP) ink, with average particle size of 150 nm, on flexible polyethylene terephthalate (PET) sheet. The feasibility of the printed SERS substrate for detecting explosive organic compounds such as 2,4-dinitrotoluene (DNT), in vapor phase, was investigated. The SERS based response of the printed substrate demonstrated an enhancement factor of four in the intensity of the Raman signal of DNT vapor when compared to target molecules adsorbed on bare PET. An 85% decrease in the intensity of the Raman spectrum was also observed as the temperature increased from 25 • C to 65 • C. The results obtained show the efficiency of the gravure printed SERS substrate to be used in applications for the detection of explosive organic compounds.

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“…Various vapor sensors for explosive detection have been proposed and under intensive study, including electrochemical sensors 1-3 , surface acoustic wave (SAW) sensors [4][5][6] , quartz crystal mcrobalance sensors 7,8 , cantilever sensors 9, 10 , luminescencebased sensors [11][12][13] , spectroscopy [14][15][16] , and refractive index (IR) based optical sensors 17,18 . Some of these sensing techniques have achieved very high sensitivity towards common explosive ananlytes, for instance, 2, 4-dinitrotoluene (DNT) and 2, 4, 6-trinitrotoluene (TNT).…”

Section: Introductionmentioning

confidence: 99%

Detection of explosive analytes using a fiber-based optical Fabry-Perot gas sensor

et al. 2010

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We demonstrate the rapid detection of explosive vapors based on a fiber-based optical Fabry-Pérot (FP) gas sensor. The sensing probe of the FP sensor is composed of a thin metal layer and a vapor-sensitive polymer layer that are deposited sequentially on a cleaved fiber endface to form an FP cavity. The interference spectrum generated from the reflected light at the metal-polymer and polymer-air interfaces changes upon the absorption of gas analyte. By monitoring the interference shift, we are able to obtain quantitative and knetic information of the interaction between the analyte and the polymer layer. We further assemble the FP sensor with a short fused silica capillary into a sensor module, and employ it in a gas chromotgraphy (GC) system for selevtive rapid on-column detection. In this report, we specifically target 2, 4-dinitrotoluene (DNT) and 2, 4, 6-trinitrotoluene (TNT) for their obvious defense applications. This work could lead to a portable sensor capable of detecting low concentrations of DNT, TNT, and other explosive chemicals.

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Detection of explosives with a coated piezoelectric quartz crystal

Cited by 67 publications

References 32 publications

Landmine Detection Technologies to Trace Explosive Vapour Detection Techniques

Landmine Detection Technologies to Trace Explosive Vapour Detection Techniques

Gravure printed flexible surface enhanced Raman spectroscopy (SERS) substrate for detection of 2,4-dinitrotoluene (DNT) vapor

Detection of explosive analytes using a fiber-based optical Fabry-Perot gas sensor

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