Low cost chemical sensor device for supersensitive pentaerythritol tetranitrate (PETN) explosives detection based on titanium dioxide nanotubes

Boehme, Mario; Voelklein, Friedemann; Ensinger, Wolfgang

doi:10.1016/j.snb.2011.06.020

Cited by 16 publications

(8 citation statements)

References 37 publications

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“…[7] Inspired by the structure of the sensing system of some moth species able to detect single pheromone molecules, we demonstrate that modifying a silicon microcantilever with a three-dimensionally ordered layer of vertically aligned titania nanotubes (TiO 2 -NTs) makes it possible to lower the TNT detection threshold down to the ppt range. This approach combines the high sensitivity of micromechanical cantilevers in dynamic mode with the attractive properties of ordered TiO 2 -NT nanostructures, [8] namely 1) their high surface area, 2) the high affinity of TiO 2 to nitro compounds, and 3) the open structure of TiO 2 -NTs which facilitates mass transport and thus results in fast sensor response.…”

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confidence: 99%

Bio‐Inspired Nanostructured Sensor for the Detection of Ultralow Concentrations of Explosives

et al. 2012

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confidence: 99%

Bio‐Inspired Nanostructured Sensor for the Detection of Ultralow Concentrations of Explosives

et al. 2012

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“…Among the different explosives, nitroaromatics are perhaps the most commonly used and from them PETN is the one with highest shattering capability. Several techniques have been developed to detect TNT including fluorescence [2], Raman spectroscopy [3], mass spectrometer [4], ion mobility spectrometry [5], metal oxide gas sensors [6,7], and electrochemical sensing [8].…”

Section: Introductionmentioning

confidence: 99%

Trace Detection of Pentaerythritol Tetranitrate Using Electrochemical Gas Sensors

et al. 2014

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Selective and sensitive detection of trace amounts of pentaerythritol tetranitrate (PETN) is demonstrated. The screening system is based on a sampling/concentrator front end and electrochemical potentiometric gas sensor as the detector. A single sensor is operated in the dominant hydrocarbon (HC) and nitrogen oxides (NOx) mode by varying the sensor operating condition. The potentiometric sensor with integrated heaters was used to capture the signature of PETN. Quantitative measurements based on hydrocarbon and nitrogen oxide sensor responses indicated that the detector sensitivity scaled proportionally with the mass of the explosives (10 μg down to 200 ng). The ratio of the HC integrated peak area to the NOxintegrated peak area is identified as an indicator of selectivity. The HC/NOxratio is unique for PETN and has a range from 1.7 to 2.7. This detection technique has the potential to become an orthogonal technique to the existing explosive screening technologies for reducing the number of false positives/false negatives in a cost-effective manner.

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“…In such situations, the active ingredient is often one of the least volatile components and potentially present in the lowest concentration [3,8]. In contrast, early development and characterization of sensor materials often requires single component vapor standards to avoid convoluting nonspecific responses [9][10][11][12]. Unavailability of a vapor standard for the compound of interest often forces researchers to compromise and use a simulant [13,14].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Delivery, and Evaluation of Picomole Vapor Standards

Rogers¹,

Johnson²,

Katilie³

2013

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A method is described for the modification and use of a gas chromatograph heated inlet for the preparation of trace vapor reference standards. A conventional GC-MS is used to validate the prepared vapor standards and an evaluation is provided on the reproducibility of replicate measurements made from a single sample as well as individual measurements made between replicate samples. The described method is applied to the preparation of single component trace organic vapors, complex vapor mixtures (containing >10 components over a concentration range spanning four orders of magnitude), and low vapor pressure analytes, which are solids under ambient conditions (e.g., ferrocene). Results demonstrate delivery of picomole quantities of single component organic vapors with a reproducibility of ca. 1% RSD.

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Low cost chemical sensor device for supersensitive pentaerythritol tetranitrate (PETN) explosives detection based on titanium dioxide nanotubes

Cited by 16 publications

References 37 publications

Bio‐Inspired Nanostructured Sensor for the Detection of Ultralow Concentrations of Explosives

Bio‐Inspired Nanostructured Sensor for the Detection of Ultralow Concentrations of Explosives

Trace Detection of Pentaerythritol Tetranitrate Using Electrochemical Gas Sensors

Preparation, Delivery, and Evaluation of Picomole Vapor Standards

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